From 991159b6b580571ae2af5338e5440b4e84ea9719 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Sun, 22 May 2022 05:47:51 +0000
Subject: [PATCH 1/8] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=202022?=
 =?UTF-8?q?0517-php=E6=96=B9=E6=B3=95.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "20220517-php\346\226\271\346\263\225.md" | 176 ----------------------
 1 file changed, 176 deletions(-)
 delete mode 100644 "20220517-php\346\226\271\346\263\225.md"

diff --git "a/20220517-php\346\226\271\346\263\225.md" "b/20220517-php\346\226\271\346\263\225.md"
deleted file mode 100644
index bf446bb..0000000
--- "a/20220517-php\346\226\271\346\263\225.md"
+++ /dev/null
@@ -1,176 +0,0 @@
-```php
-<?php
-
-//1、写一段代码，定义一个汽车类，有品牌与价格两种属性。并为类实例化对象，为对象的属性赋值并引用。
-class Car{
-
-    private $brand;//品牌
-    private $price;//价格
-    
-    function __construct($brand,$price){
-        $this->brand=$brand;
-        $this->price=$price;
-    
-    }
-    
-    /**
-     * @return mixed
-     */
-    public function getBrand()
-    {
-        return $this->brand;
-    }
-    
-    /**
-     * @param mixed $brand
-     */
-    public function setBrand($brand)
-    {
-        $this->brand = $brand;
-    }
-    
-    /**
-     * @return mixed
-     */
-    public function getPrice()
-    {
-        return $this->price;
-    }
-    
-    /**
-     * @param mixed $price
-     */
-    public function setPrice($price)
-    {
-        $this->price = $price;
-    }
-
-   function show(){
-        echo "这辆汽车的牌子是：".$this->brand."它的价格为：".$this->price;
-   }
-
-}
-
-$a=new Car("大众","39999");
-$a->show();
-
-echo "<hr>";
-//2、在上例的基础上为汽车类定义一个子类——跑车类。为子类实例化对象并访问父类的属性。
-
-class SportsCar extends Car {
-
-    function __construct($brand, $price)
-    {
-        parent::__construct($brand, $price);
-    }
-    
-    function cool(){
-        echo "它看来非常的酷";
-    }
-
-}
-
-$b = new Sportscar("劳斯莱斯","9000000");
-echo "这辆汽车的牌子是：".$this->brand."它的价格为：".$this->price;
-$b->cool();
-echo "<hr>";
-/3、定义一个类，分别定义3个公共的属性和方法，3个受保护的属性和方法，3个私有属性和方法。
-class  A{
-
-//公共的
-public $name;
-public $age;
-public $sex;
-      function eat(){
-        echo "吃饭";
-    }
-
-    function sleep(){
-        echo "睡觉";
-    }
-
-    function skill(){//技能
-        echo "手撕鬼子";
-    }
-//受保护的
-protected $height;//身高
-protected $weight;//体重
-protected $address;//地址
-        protected function face(){
-        echo "人脸识别";
-    }
-    protected function short(){
-        echo "验证码";
-    }
-    protected function information(){
-        echo "填写身份证信息";
-    }
-
-//私有的
-private $grade;//成绩
-private $classname;//班级
-private $id;//学号
- /**
-     * @return mixed
-     */
-    public function getGrade()
-    {
-        return $this->grade;
-    }
-
-    /**
-     * @param mixed $grade
-     */
-    public function setGrade($grade): void
-    {
-        $this->grade = $grade;
-    }
-
-    /**
-     * @return mixed
-     */
-    public function getClassname()
-    {
-        return $this->classname;
-    }
-
-    /**
-     * @param mixed $classname
-     */
-    public function setClassnamel($classname): void
-    {
-        $this->classname = $classname;
-    }
-
-    /**
-     * @return mixed
-     */
-    public function getId()
-    {
-        return $this->id;
-    }
-
-    /**
-     * @param mixed $id
-     */
-     public function setId($id): void
-    {
-        $this->id = $id;
-    }
-
-  private function money{
-        echo "会花钱";
-    }
-    private function book{
-        echo "会看书";
-    }
-    private function attendclass{
-        echo "会上专业课";
-    }
-
-}
-
-```
-
-
-
-- 
Gitee


From 9e408f697673f9764a49d65723e7ba7fc6059848 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Sun, 22 May 2022 05:49:42 +0000
Subject: [PATCH 2/8] 1 1

---
 ...2\344\274\240\346\226\207\344\273\266.php" | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php" "b/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php"
new file mode 100644
index 0000000..b9c972a
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php"
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>�ϴ��ļ�</title>
+</head>
+<body>
+<form action="demo.php" method="post" enctype="multipart/form-data">
+    ��ѡ����Ҫ�ϴ����ļ���<input type="file" name="files">
+    <br>
+    <input type="submit" value="�ϴ�">
+</form>
+
+</body>
+</html>
+<?php
+//1��	ʵ��һ���ļ��ϴ�������ֻ���ϴ�pdf��word��ʽ����СΪ1M���ڡ�
+print_r($_FILES);
+$error =$_FILES['files']['error'];
+if ($error==0){
+    define("size",1024*1024);
+    $size=$_FILES['files']['size'];
+    if ($size>size){
+        echo "<br>";
+        echo "�ϴ����ļ�̫��";
+        echo "<br>";
+    }else{
+        echo "<br>";
+        echo "�ļ��ϴ��ɹ�";
+        echo "<br>";
+    }
+}
+$str=array("pdf","word");
+$name=$_FILES['files']['name'];
+$nameArr =explode(".",$name);
+$nameLast =end($nameArr);
+$result=in_array($nameLast,$str);
+if (!$result){
+    echo "���ļ��������ϴ�������";
+}else{
+    echo "���ļ������ϴ�������";
+}
\ No newline at end of file
-- 
Gitee


From d7a3683f8f4bea1fd25f82c5981c38c2bdb05325 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Sun, 22 May 2022 05:52:55 +0000
Subject: [PATCH 3/8] aa z

---
 .../20220517php\346\226\271\346\263\225.php"  | 178 ++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php" "b/\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php"
new file mode 100644
index 0000000..5913347
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php"
@@ -0,0 +1,178 @@
+```php
+<?php
+
+//1��дһ�δ��룬����һ�������࣬��Ʒ����۸��������ԡ���Ϊ��ʵ��������Ϊ��������Ը�ֵ�����á�
+class Car{
+
+    private $brand;//Ʒ��
+    private $price;//�۸�
+    
+    function __construct($brand,$price){
+        $this->brand=$brand;
+        $this->price=$price;
+    
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getBrand()
+    {
+        return $this->brand;
+    }
+    
+    /**
+     * @param mixed $brand
+     */
+    public function setBrand($brand)
+    {
+        $this->brand = $brand;
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getPrice()
+    {
+        return $this->price;
+    }
+    
+    /**
+     * @param mixed $price
+     */
+    public function setPrice($price)
+    {
+        $this->price = $price;
+    }
+
+   function show(){
+        echo "���������������ǣ�".$this->brand."���ļ۸�Ϊ��".$this->price;
+   }
+
+}
+
+$a=new Car("����","39999");
+$a->show();
+
+echo "<hr>";
+//2���������Ļ�����Ϊ�����ඨ��һ�����ࡪ���ܳ��ࡣΪ����ʵ�������󲢷��ʸ�������ԡ�
+
+class SportsCar extends Car {
+
+    function __construct($brand, $price)
+    {
+        parent::__construct($brand, $price);
+    }
+    
+    function cool(){
+        echo "�������dz��Ŀ�";
+    }
+
+}
+
+$b = new Sportscar("��˹��˹","9000000");
+echo "���������������ǣ�".$this->brand."���ļ۸�Ϊ��".$this->price;
+$b->cool();
+echo "<hr>";
+/3������һ���࣬�ֱ���3�����������Ժͷ�����3���ܱ��������Ժͷ�����3��˽�����Ժͷ�����
+class  A{
+
+//������
+public $name;
+public $age;
+public $sex;
+      function eat(){
+        echo "�Է�";
+    }
+
+    function sleep(){
+        echo "˯��";
+    }
+
+    function skill(){//����
+        echo "��˺����";
+    }
+//�ܱ�����
+protected $height;//����
+protected $weight;//����
+protected $address;//��ַ
+        protected function face(){
+        echo "����ʶ��";
+    }
+    protected function short(){
+        echo "��֤��";
+    }
+    protected function information(){
+        echo "��д����֤��Ϣ";
+    }
+
+//˽�е�
+private $grade;//�ɼ�
+private $classname;//�༶
+private $id;//ѧ��
+ /**
+     * @return mixed
+     */
+    public function getGrade()
+    {
+        return $this->grade;
+    }
+
+    /**
+     * @param mixed $grade
+     */
+    public function setGrade($grade): void
+    {
+        $this->grade = $grade;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getClassname()
+    {
+        return $this->classname;
+    }
+
+    /**
+     * @param mixed $classname
+     */
+    public function setClassnamel($classname): void
+    {
+        $this->classname = $classname;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param mixed $id
+     */
+     public function setId($id): void
+    {
+        $this->id = $id;
+    }
+
+  private function money{
+        echo "�ỨǮ";
+    }
+    private function book{
+        echo "�ῴ��";
+    }
+    private function attendclass{
+        echo "����רҵ��";
+    }
+
+}
+
+```
+
+
+
+
+}
\ No newline at end of file
-- 
Gitee


From 77108363de5b69b52775211f3a5a22e69f792ba7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Mon, 23 May 2022 14:51:23 +0000
Subject: [PATCH 4/8] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=20?=
 =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D/20220517php=E6=96=B9=E6=B3=95.php?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../20220517php\346\226\271\346\263\225.php"  | 178 ------------------
 1 file changed, 178 deletions(-)
 delete mode 100644 "\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php" "b/\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php"
deleted file mode 100644
index 5913347..0000000
--- "a/\351\231\210\345\207\214\350\212\235/20220517php\346\226\271\346\263\225.php"
+++ /dev/null
@@ -1,178 +0,0 @@
-```php
-<?php
-
-//1��дһ�δ��룬����һ�������࣬��Ʒ����۸��������ԡ���Ϊ��ʵ��������Ϊ��������Ը�ֵ�����á�
-class Car{
-
-    private $brand;//Ʒ��
-    private $price;//�۸�
-    
-    function __construct($brand,$price){
-        $this->brand=$brand;
-        $this->price=$price;
-    
-    }
-    
-    /**
-     * @return mixed
-     */
-    public function getBrand()
-    {
-        return $this->brand;
-    }
-    
-    /**
-     * @param mixed $brand
-     */
-    public function setBrand($brand)
-    {
-        $this->brand = $brand;
-    }
-    
-    /**
-     * @return mixed
-     */
-    public function getPrice()
-    {
-        return $this->price;
-    }
-    
-    /**
-     * @param mixed $price
-     */
-    public function setPrice($price)
-    {
-        $this->price = $price;
-    }
-
-   function show(){
-        echo "���������������ǣ�".$this->brand."���ļ۸�Ϊ��".$this->price;
-   }
-
-}
-
-$a=new Car("����","39999");
-$a->show();
-
-echo "<hr>";
-//2���������Ļ�����Ϊ�����ඨ��һ�����ࡪ���ܳ��ࡣΪ����ʵ�������󲢷��ʸ�������ԡ�
-
-class SportsCar extends Car {
-
-    function __construct($brand, $price)
-    {
-        parent::__construct($brand, $price);
-    }
-    
-    function cool(){
-        echo "�������dz��Ŀ�";
-    }
-
-}
-
-$b = new Sportscar("��˹��˹","9000000");
-echo "���������������ǣ�".$this->brand."���ļ۸�Ϊ��".$this->price;
-$b->cool();
-echo "<hr>";
-/3������һ���࣬�ֱ���3�����������Ժͷ�����3���ܱ��������Ժͷ�����3��˽�����Ժͷ�����
-class  A{
-
-//������
-public $name;
-public $age;
-public $sex;
-      function eat(){
-        echo "�Է�";
-    }
-
-    function sleep(){
-        echo "˯��";
-    }
-
-    function skill(){//����
-        echo "��˺����";
-    }
-//�ܱ�����
-protected $height;//����
-protected $weight;//����
-protected $address;//��ַ
-        protected function face(){
-        echo "����ʶ��";
-    }
-    protected function short(){
-        echo "��֤��";
-    }
-    protected function information(){
-        echo "��д����֤��Ϣ";
-    }
-
-//˽�е�
-private $grade;//�ɼ�
-private $classname;//�༶
-private $id;//ѧ��
- /**
-     * @return mixed
-     */
-    public function getGrade()
-    {
-        return $this->grade;
-    }
-
-    /**
-     * @param mixed $grade
-     */
-    public function setGrade($grade): void
-    {
-        $this->grade = $grade;
-    }
-
-    /**
-     * @return mixed
-     */
-    public function getClassname()
-    {
-        return $this->classname;
-    }
-
-    /**
-     * @param mixed $classname
-     */
-    public function setClassnamel($classname): void
-    {
-        $this->classname = $classname;
-    }
-
-    /**
-     * @return mixed
-     */
-    public function getId()
-    {
-        return $this->id;
-    }
-
-    /**
-     * @param mixed $id
-     */
-     public function setId($id): void
-    {
-        $this->id = $id;
-    }
-
-  private function money{
-        echo "�ỨǮ";
-    }
-    private function book{
-        echo "�ῴ��";
-    }
-    private function attendclass{
-        echo "����רҵ��";
-    }
-
-}
-
-```
-
-
-
-
-}
\ No newline at end of file
-- 
Gitee


From fd08def720643b7919e30088d7695484e00c15d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Mon, 23 May 2022 15:00:43 +0000
Subject: [PATCH 5/8] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=20?=
 =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../20220510-php.md"                          | 36 -----------
 .../20220511-\345\276\252\347\216\257.md"     | 37 ------------
 .../20220516-php \350\257\255\346\263\225.md" | 60 -------------------
 ...2\344\274\240\346\226\207\344\273\266.php" | 42 -------------
 4 files changed, 175 deletions(-)
 delete mode 100644 "\351\231\210\345\207\214\350\212\235/20220510-php.md"
 delete mode 100644 "\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.md"
 delete mode 100644 "\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md"
 delete mode 100644 "\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220510-php.md" "b/\351\231\210\345\207\214\350\212\235/20220510-php.md"
deleted file mode 100644
index b7cf0a8..0000000
--- "a/\351\231\210\345\207\214\350\212\235/20220510-php.md"
+++ /dev/null
@@ -1,36 +0,0 @@
-# �ʼ�
-
-```php
-$name="��"��
-var_dump($name); var_dump(������)�����ر��������ͺͳ��Ⱥ�ֵ��
-echo:���������ַ������޷��ء�
-print��ֻ�����һ���ַ����������ɹ�����1��
-php������.����+�š�
-```
-
-# ��ҵһ��
-
-```php
-<?php
-echo "
-<center>
-     <h1><<��ҹ˼>></h1> 
-     <h2>       -- ���</h2> 
-     <font><b>��ǰ���¹⣬���ǵ���˪��<br>
-        ��ͷ�����£���ͷ˼���硣<br></b></font>";
-```
-
-# ��ҵ����
-
-```php
-<?php
-echo " 
-
-<center><h1>���ҽ���</h1></center>
-
-<b>��Һã��ҽг���֥������һ���������ġ��������ص��ˣ�����˵��ֻ֪���յ��ң��Է����յ��ң��������Ტ�ۡ�<br>
-����һ��׷�����������������ߡ�ƽʱ���ºڣ����Բ��Ҷ�����İ������֮����Ҳ������ˣ����ҿ�Щ�ֲ�Ƭ��<br>
-����һ��������������ǰ��ŭ�ļһס�ڵ����ϵ��ˣ��Ҷ�����ʶ����ֻ���˲�����ò��û���������ˡ�<br>
-����һ���᲻�������ˡ�����л����������������Ҷ�����ɵЦʱ���벻Ҫ���ȣ�Ҳ��Ҫ���ɡ��ҿ����뵽һЩ��Ц�Ķ������Ҿ�����ôһ���ˣ�
-ϣ����һ�ϲ���ҡ�</b>";
-```
diff --git "a/\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.md" "b/\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.md"
deleted file mode 100644
index 20e2610..0000000
--- "a/\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.md"
+++ /dev/null
@@ -1,37 +0,0 @@
-```php
-<?php
-//1��	�����������������������ε������߳����ж��������Dz���ֱ��������
-//��ʾ��ֱ����������ֱ�DZߵ�ƽ���͵���б�ߵ�ƽ����
-$a=1;
-$b=1;
-$c=5;
-if ($a*$a+$b*$b==$c*$c or $c*$c+$b*$b==$a*$a or $a*$a+$c*$c==$b*$b){
-    echo "��ֱ��������";
-}else{
-    echo "����ֱ��������";
-}
-<?php
-//	���װ����ˮij����ˮ����������֡�������������:ѡ�ֺ���ˮС�ڵ���20ƿ��ÿƿ��1���ּ��㡣
-//ѡ�ֺ���ˮ����20ƿ���������ְ�ÿƿ1.5���ּ��㡣
-$sum=0;
-$a=23;
-if ($a<=20) {
-    for ($i = 0; $i <= $a; $i++) {
-        $sum = $i;
-
-    }
-}else{
-    $sum=($a-20)*1.5+20;
-}echo "$sum";
-<?php
-//3��ʹ��ѭ���������1-10֮������֣��������ַ���ʵ�֡�
-echo "<br>";
-for ($i=10;$i>0;$i--) {
-    echo "$i" . "<br>";
-
-}
-$a=10;
-while ($a>=1){
-   echo  $a. "<br>";
-   $a--;
-}
\ No newline at end of file
diff --git "a/\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md" "b/\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md"
deleted file mode 100644
index b4738ad..0000000
--- "a/\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md"	
+++ /dev/null
@@ -1,60 +0,0 @@
-```php
-print_r:专门打印数组
-count:返回数组长度
-关联数组格式：$数组名=array("建名1"=>"值1","值名2"=>"值2");
-            echo  $数组名[键名1];
-动态赋值："键名1"="值1"
-比较大小：getMax($a,$b);
-sort:对数组进行升序
-rsort:对数组进行降序
-explode(separator,string):把数组分割为数组
-$arr=explode(separator,".",数组名)
-trim():去除两边的空格
-ltrim():去除左边的空格
-rtrim():去除右边的空格
-chop()与 rtrim()作用相同，去除右边的空格
-ucwords():将每个单词的首字母大写
-ucfirst():整个字符串的首字母大写
-strtoupper():全部单词大写
-strtolower():全部单词小写
-str_word_count:统计单词
-```
-
-
-
-```php
-<?php
-//1、	自定义函数求圆的面积
-$r=2;
-$sum=0;
-$sum=3.14*$r*$r;
-echo "圆的面积为：".$sum;
-echo "<hr>";
-//2、	至少对3个字符串函数进行应用
-$aa="    i am girl   ";
-echo trim($aa)."<br>";
-echo ucwords($aa)."<br>";
-echo strtoupper($aa);
-echo "<hr>";
-//3、	写一段程序，创建一个数组，其元素内容为从1到20的所有整数，并输出该数组。
-$a=array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20);
-$lenght=count($a);
-for ($i=0;$i<$lenght;$i++){
-    echo  "$a[$i]";
-}
-echo "<hr>";
-//4、	写一段代码，查找数组中是否存在某一个指定的元素，如果存在则返回数组的索引。
-$arr=array("name"=>"陈某","age">=18);
-echo array_search(18,$arr);
-echo "<hr>";
-//5、	写一段程序，创建一个关联数组，其元素是姓名，年龄，性别等个人信息，并输出该数组。
-$c["name"]="小陈";
-$c["age"]=18;
-$c["sex"]="女";
-$c["school"]="清华";
-$lenght=count($c);
-for ($i=0;$i<$lenght;$i++){
-    echo  "$c[$i]";
-}
-```
-
diff --git "a/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php" "b/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php"
deleted file mode 100644
index b9c972a..0000000
--- "a/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240\346\226\207\344\273\266.php"
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <title>�ϴ��ļ�</title>
-</head>
-<body>
-<form action="demo.php" method="post" enctype="multipart/form-data">
-    ��ѡ����Ҫ�ϴ����ļ���<input type="file" name="files">
-    <br>
-    <input type="submit" value="�ϴ�">
-</form>
-
-</body>
-</html>
-<?php
-//1��	ʵ��һ���ļ��ϴ�������ֻ���ϴ�pdf��word��ʽ����СΪ1M���ڡ�
-print_r($_FILES);
-$error =$_FILES['files']['error'];
-if ($error==0){
-    define("size",1024*1024);
-    $size=$_FILES['files']['size'];
-    if ($size>size){
-        echo "<br>";
-        echo "�ϴ����ļ�̫��";
-        echo "<br>";
-    }else{
-        echo "<br>";
-        echo "�ļ��ϴ��ɹ�";
-        echo "<br>";
-    }
-}
-$str=array("pdf","word");
-$name=$_FILES['files']['name'];
-$nameArr =explode(".",$name);
-$nameLast =end($nameArr);
-$result=in_array($nameLast,$str);
-if (!$result){
-    echo "���ļ��������ϴ�������";
-}else{
-    echo "���ļ������ϴ�������";
-}
\ No newline at end of file
-- 
Gitee


From d15943765c4cff2d455fbd732ad63e9530e7359a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Mon, 23 May 2022 22:57:32 +0800
Subject: [PATCH 6/8] d

---
 .../20220510-php\345\237\272\347\241\200.txt" |  41 ++++
 .../20220511-\345\276\252\347\216\257.txt"    |  37 ++++
 .../20220516-php \350\257\255\346\263\225.md" |  60 ++++++
 .../20220517-php\346\226\271\346\263\225.md"  | 176 ++++++++++++++++++
 .../20220518-php\344\270\212\344\274\240.txt" |  47 +++++
 ...hp\346\225\260\346\215\256\345\272\223.md" |  52 ++++++
 6 files changed, 413 insertions(+)
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220510-php\345\237\272\347\241\200.txt"
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.txt"
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md"
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220517-php\346\226\271\346\263\225.md"
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240.txt"
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220523-php\346\225\260\346\215\256\345\272\223.md"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220510-php\345\237\272\347\241\200.txt" "b/\351\231\210\345\207\214\350\212\235/20220510-php\345\237\272\347\241\200.txt"
new file mode 100644
index 0000000..32b819d
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220510-php\345\237\272\347\241\200.txt"
@@ -0,0 +1,41 @@
+# �ʼ�
+
+```php
+$name="��"��
+var_dump($name); var_dump(������)�����ر��������ͺͳ��Ⱥ�ֵ��
+echo:���������ַ������޷��ء�
+print��ֻ�����һ���ַ����������ɹ�����1��
+php������.����+�š�
+```
+
+# ��ҵһ��
+
+```php
+<?php
+echo "
+<center>
+     <h1><<��ҹ˼>></h1> 
+     <h2>       -- ���</h2> 
+     <font><b>��ǰ���¹⣬���ǵ���˪��<br>
+        ��ͷ�����£���ͷ˼���硣<br></b></font>";
+```
+
+# ��ҵ����
+
+```php
+<?php
+echo " 
+
+<center><h1>���ҽ���</h1></center>
+
+<b>��Һã��ҽг���֥������һ���������ġ��������ص��ˣ�����˵��ֻ֪���յ��ң��Է����յ��ң��������Ტ�ۡ�<br>
+����һ��׷�����������������ߡ�ƽʱ���ºڣ����Բ��Ҷ�����İ������֮����Ҳ������ˣ����ҿ�Щ�ֲ�Ƭ��<br>
+����һ��������������ǰ��ŭ�ļһס�ڵ����ϵ��ˣ��Ҷ�����ʶ����ֻ���˲�����ò��û���������ˡ�<br>
+����һ���᲻�������ˡ�����л����������������Ҷ�����ɵЦʱ���벻Ҫ���ȣ�Ҳ��Ҫ���ɡ��ҿ����뵽һЩ��Ц�Ķ������Ҿ�����ôһ���ˣ�
+ϣ����һ�ϲ���ҡ�</b>";
+```
+
+
+
+
+
diff --git "a/\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.txt" "b/\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.txt"
new file mode 100644
index 0000000..f689363
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220511-\345\276\252\347\216\257.txt"
@@ -0,0 +1,37 @@
+```php
+<?php
+//1、	用三个变量，代表的三角形的三个边长，判断三角形是不是直角三角形
+//提示（直角三角形两直角边的平方和等于斜边的平方）
+$a=1;
+$b=1;
+$c=5;
+if ($a*$a+$b*$b==$c*$c or $c*$c+$b*$b==$a*$a or $a*$a+$c*$c==$b*$b){
+    echo "是直角三角形";
+}else{
+    echo "不是直角三角形";
+}
+<?php
+//	简易版喝汽水某喝汽水比赛，求积分。比赛规则如下:选手喝汽水小于等于20瓶，每瓶按1积分计算。
+//选手喝汽水大于20瓶，超出部分按每瓶1.5积分计算。
+$sum=0;
+$a=23;
+if ($a<=20) {
+    for ($i = 0; $i <= $a; $i++) {
+        $sum = $i;
+
+    }
+}else{
+    $sum=($a-20)*1.5+20;
+}echo "$sum";
+<?php
+//3、使用循环倒序输出1-10之间的数字，至少两种方法实现。
+echo "<br>";
+for ($i=10;$i>0;$i--) {
+    echo "$i" . "<br>";
+
+}
+$a=10;
+while ($a>=1){
+   echo  $a. "<br>";
+   $a--;
+}
\ No newline at end of file
diff --git "a/\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md" "b/\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md"
new file mode 100644
index 0000000..22bb172
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220516-php \350\257\255\346\263\225.md"	
@@ -0,0 +1,60 @@
+```php
+print_r:专门打印数组
+count:返回数组长度
+关联数组格式：$数组名=array("建名1"=>"值1","值名2"=>"值2");
+            echo  $数组名[键名1];
+动态赋值："键名1"="值1"
+比较大小：getMax($a,$b);
+sort:对数组进行升序
+rsort:对数组进行降序
+explode(separator,string):把数组分割为数组
+$arr=explode(separator,".",数组名)
+trim():去除两边的空格
+ltrim():去除左边的空格
+rtrim():去除右边的空格
+chop()与 rtrim()作用相同，去除右边的空格
+ucwords():将每个单词的首字母大写
+ucfirst():整个字符串的首字母大写
+strtoupper():全部单词大写
+strtolower():全部单词小写
+str_word_count:统计单词
+```
+
+
+
+```php
+<?php
+//1、	自定义函数求圆的面积
+$r=2;
+$sum=0;
+$sum=3.14*$r*$r;
+echo "圆的面积为：".$sum;
+echo "<hr>";
+//2、	至少对3个字符串函数进行应用
+$aa="    i am girl   ";
+echo trim($aa)."<br>";
+echo ucwords($aa)."<br>";
+echo strtoupper($aa);
+echo "<hr>";
+//3、	写一段程序，创建一个数组，其元素内容为从1到20的所有整数，并输出该数组。
+$a=array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20);
+$lenght=count($a);
+for ($i=0;$i<$lenght;$i++){
+    echo  "$a[$i]";
+}
+echo "<hr>";
+//4、	写一段代码，查找数组中是否存在某一个指定的元素，如果存在则返回数组的索引。
+$arr=array("name"=>"陈某","age">=18);
+echo array_search(18,$arr);
+echo "<hr>";
+//5、	写一段程序，创建一个关联数组，其元素是姓名，年龄，性别等个人信息，并输出该数组。
+$c["name"]="小陈";
+$c["age"]=18;
+$c["sex"]="女";
+$c["school"]="清华";
+$lenght=count($c);
+for ($i=0;$i<$lenght;$i++){
+    echo  "$c[$i]";
+}
+```
+
diff --git "a/\351\231\210\345\207\214\350\212\235/20220517-php\346\226\271\346\263\225.md" "b/\351\231\210\345\207\214\350\212\235/20220517-php\346\226\271\346\263\225.md"
new file mode 100644
index 0000000..3877999
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220517-php\346\226\271\346\263\225.md"
@@ -0,0 +1,176 @@
+```php
+<?php
+
+//1、写一段代码，定义一个汽车类，有品牌与价格两种属性。并为类实例化对象，为对象的属性赋值并引用。
+class Car{
+
+    private $brand;//品牌
+    private $price;//价格
+    
+    function __construct($brand,$price){
+        $this->brand=$brand;
+        $this->price=$price;
+    
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getBrand()
+    {
+        return $this->brand;
+    }
+    
+    /**
+     * @param mixed $brand
+     */
+    public function setBrand($brand)
+    {
+        $this->brand = $brand;
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getPrice()
+    {
+        return $this->price;
+    }
+    
+    /**
+     * @param mixed $price
+     */
+    public function setPrice($price)
+    {
+        $this->price = $price;
+    }
+
+   function show(){
+        echo "这辆汽车的牌子是：".$this->brand."它的价格为：".$this->price;
+   }
+
+}
+
+$a=new Car("大众","39999");
+$a->show();
+
+echo "<hr>";
+//2、在上例的基础上为汽车类定义一个子类——跑车类。为子类实例化对象并访问父类的属性。
+
+class SportsCar extends Car {
+
+    function __construct($brand, $price)
+    {
+        parent::__construct($brand, $price);
+    }
+    
+    function cool(){
+        echo "它看来非常的酷";
+    }
+
+}
+
+$b = new Sportscar("劳斯莱斯","9000000");
+echo "这辆汽车的牌子是：".$this->brand."它的价格为：".$this->price;
+$b->cool();
+echo "<hr>";
+/3、定义一个类，分别定义3个公共的属性和方法，3个受保护的属性和方法，3个私有属性和方法。
+class  A{
+
+//公共的
+public $name;
+public $age;
+public $sex;
+      function eat(){
+        echo "吃饭";
+    }
+
+    function sleep(){
+        echo "睡觉";
+    }
+
+    function skill(){//技能
+        echo "手撕鬼子";
+    }
+//受保护的
+protected $height;//身高
+protected $weight;//体重
+protected $address;//地址
+        protected function face(){
+        echo "人脸识别";
+    }
+    protected function short(){
+        echo "验证码";
+    }
+    protected function information(){
+        echo "填写身份证信息";
+    }
+
+//私有的
+private $grade;//成绩
+private $classname;//班级
+private $id;//学号
+ /**
+     * @return mixed
+     */
+    public function getGrade()
+    {
+        return $this->grade;
+    }
+
+    /**
+     * @param mixed $grade
+     */
+    public function setGrade($grade): void
+    {
+        $this->grade = $grade;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getClassname()
+    {
+        return $this->classname;
+    }
+
+    /**
+     * @param mixed $classname
+     */
+    public function setClassnamel($classname): void
+    {
+        $this->classname = $classname;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+     * @param mixed $id
+     */
+     public function setId($id): void
+    {
+        $this->id = $id;
+    }
+
+  private function money{
+        echo "会花钱";
+    }
+    private function book{
+        echo "会看书";
+    }
+    private function attendclass{
+        echo "会上专业课";
+    }
+
+}
+
+```
+
+
+
diff --git "a/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240.txt" "b/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240.txt"
new file mode 100644
index 0000000..d92d88b
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220518-php\344\270\212\344\274\240.txt"
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>上传文件</title>
+</head>
+<body>
+<form action="demo.php" method="post" enctype="multipart/form-data">
+    请选择你要上传的文件：<input type="file" name="files">
+    <br>
+    <input type="submit" value="上传">
+</form>
+</body>
+</html>
+
+```php
+<?php
+//1、	实现一个文件上传，限制只能上传pdf和word格式，大小为1M以内。
+print_r($_FILES);
+$error =$_FILES['files']['error'];
+if ($error==0){
+    define("size",1024*1024);
+    $size=$_FILES['files']['size'];
+    if ($size>size){
+        echo "<br>";
+        echo "上传的文件太大！";
+        echo "<br>";
+    }else{
+        echo "<br>";
+        echo "文件上传成功";
+        echo "<br>";
+    }
+}
+$str=array("pdf","word");
+$name=$_FILES['files']['name'];
+$nameArr =explode(".",$name);
+$nameLast =end($nameArr);
+$result=in_array($nameLast,$str);
+if (!$result){
+    echo "该文件不符合上传的类型";
+}else{
+    echo "该文件符合上传的类型";
+}
+
+
+```
+
diff --git "a/\351\231\210\345\207\214\350\212\235/20220523-php\346\225\260\346\215\256\345\272\223.md" "b/\351\231\210\345\207\214\350\212\235/20220523-php\346\225\260\346\215\256\345\272\223.md"
new file mode 100644
index 0000000..a85be45
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220523-php\346\225\260\346\215\256\345\272\223.md"
@@ -0,0 +1,52 @@
+```sql
+drop database if exists student; 
+create database student charset utf8;
+use student;
+create table user(
+	id int primary key auto_increment,
+	name varchar(10) not null,
+	score decimal(2,1) not null
+);
+```
+
+```php
+// 完成PHP访问数据库五步。使用mysqli扩展对mysql数据库中的学生信息表进行增删改查。
+
+<?php
+$con = mysqli_connect('127.0.0.1','root','123456','Student');
+mysqli_query($con,'set names utf8');
+if (!$con){
+    die("连接失败");
+}
+$sql1="insert into `user` (`name`,`score`) values ('陈小虫',98.5),('吴大虫',75.5),('陈得胜',66)";
+$res1 = mysqli_query($con,$sql1);
+if ($res1){
+    echo "添加成功 <br>";
+}else{
+    echo "添加失败 <br>";
+}
+$sql2= "delete from `user` where `id`=10";
+$res2= mysqli_query($con,$sql2);
+if ($res2){
+    echo "删除成功 <br>";
+}else{
+    echo "删除失败 <br>";
+}
+$sql3= "update `user` set `name`='小明' where `id`=12  ";
+$res3 = mysqli_query($con,$sql3);
+if ($res3){
+    echo "修改成功<br>";
+}else{
+    echo "修改失败<br>";
+}
+$sql4 = "select * from `user`";
+$res4 = mysqli_query($con,$sql4) or die("查找失败<br>");
+
+
+while($a=mysqli_fetch_assoc($res4) ){
+    echo $a['id']." ".$a['name']." ".$a['score']."<br>";
+}
+
+
+```
+
-- 
Gitee


From c40738718ec23fd595299dba98f71b5f8e52e2b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Tue, 24 May 2022 22:42:17 +0800
Subject: [PATCH 7/8] a

---
 .../20220524-\347\275\221\351\241\265.md"     | 212 ++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220524-\347\275\221\351\241\265.md"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220524-\347\275\221\351\241\265.md" "b/\351\231\210\345\207\214\350\212\235/20220524-\347\275\221\351\241\265.md"
new file mode 100644
index 0000000..ea59f3f
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220524-\347\275\221\351\241\265.md"
@@ -0,0 +1,212 @@
+```mysql
+CREATE DATABASE student CHARSET utf8;
+use student;
+CREATE table user(
+id int PRIMARY key auto_increment,
+name VARCHAR(20) not null,
+score DECIMAL(5,2) not null
+);
+INSERT into user VALUES (1,"陈小龙",98.5),(2,"吴大虫",75.5),(3,"陈得胜",66);
+```
+```php
+
+
+//conn.php
+<?php
+error_reporting(E_ALL ^ E_WARNING);
+$conn=mysqli_connect("127.0.0.1","root","123456","student");
+mysqli_query($conn,'set names utf8');
+
+//index.php
+<?php
+include_once('conn.php');// 包含数据库文件
+$sql = "select * from `user` order by id";// 把user表里的所有数据查询出来的语句
+$result = mysqli_query($conn,$sql);//执行上面的语句,返回一个结果集
+?>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>
+        学生管理系统
+    </title>
+    <script>
+        function del(){
+            if(!window.confirm("确定要删除吗？")){
+                return false;
+            }
+        }
+    </script>
+</head>
+<body>
+<h1>学生管理系统-首页</h1>
+<table border="1" width="300">
+    <tr>
+        <th>编号</th>
+        <th>姓名</th>
+        <th>成绩</th>
+        <th>操作</th>
+    </tr>
+    <?php
+    // 循环之前可以做个判断，结果集是否为空。
+    if(!mysqli_num_rows($result)) {//
+        echo "<tr align='center'><td colspan='4'>暂无数据！</td></tr>";
+    }else {
+    while ($row = mysqli_fetch_assoc($result)) {
+    ?>
+    <tr align="center">
+        <td><?php echo $row['id'] ?></td>
+        <td><?php echo $row['name'] ?></td>
+        <td><?php echo $row['score'] ?></td>
+        <td><a href="edit.php?id=<?php echo $row['id'] ?>">修改</a>|
+            <a href="delete.php?id=<?php echo $row['id'] ?>" onclick="return del();">删除</a></td>
+    </tr>
+        <?php
+    }
+    }
+    ?>
+</table>
+<a href="add.php">添加数据</a>
+</body>
+</html>
+
+
+//add.php
+<?php
+?>
+<html>
+<head>
+    <title>添加数据</title>
+</head>
+<h1>添加数据</h1>
+<form action="save.php" method="post">
+    <table border="1" width="300">
+        <tr>
+            <th>姓名</th><td><input type="text" name="name"></td>
+        </tr>
+        <tr>
+            <th>成绩</th><td><input type="text" name="score"></td>
+        </tr>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp;
+                <input type="reset" value="取消"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">返回</a>
+
+</form>
+</html>
+
+
+//edit.php
+<?php
+include_once ("./conn.php");
+if(!isset($_GET['id'])){
+    die("非法访问！");
+}
+$id=$_GET['id'];
+
+$sql = "select * from `user` where `id`=$id";// 从数据库查询id为$id的数据
+$result = mysqli_query($conn,$sql);
+$row = mysqli_fetch_assoc($result);
+?>
+<html>
+<head>
+    <title>修改数据</title>
+
+</head>
+<h1>修改数据</h1>
+<form action="update.php" method="post">
+    <table border="1" width="300">
+        <tr>
+            <th>姓名</th><td><input type="text" name="name" value="<?php echo $row['name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>成绩</th><td><input type="text" name="score" value="<?php echo $row['score'] ?>"></td>
+        </tr>
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp;
+                <input type="reset" value="取消"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">返回</a>
+
+</form>
+</html>
+
+
+//update.php
+<?php
+/**
+ * 接收表单数据。并提交到数据库
+ */
+// 包含数据库连接文件
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+$id=$_POST['id'];//编号
+$name=$_POST['name'];// 姓名
+$score=$_POST['score'];// 成绩
+// 定义要执行sql语句。
+$sql = "update `user` set `name`='$name',score=$score where id=$id";
+//echo $sql;
+// 执行sql语句操作
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "修改成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "修改失败！";
+}
+
+
+//delete.php
+<?php
+/**
+ * 接收表单数据。并提交到数据库
+ */
+// 包含数据库连接文件
+
+include_once('conn.php');
+$id=$_GET['id'];//  得到要删除的图书id
+
+
+// 定义要执行sql语句。
+$sql = "delete from `user` where id=$id";
+//echo $sql;
+// 执行sql语句操作
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "删除成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "删除失败！";
+}
+
+
+//save.php
+<?php
+/**
+ * 接收表单数据。并提交到数据库
+ */
+// 包含数据库连接文件
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+
+$name=$_POST['name'];// 姓名
+$score=$_POST['score'];// 成绩
+// 定义要执行sql语句。
+$sql = "insert into `user` (name,score) values ('$name',$score)";
+//echo $sql;
+// 执行sql语句操作
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "添加成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "添加失败！";
+}
\ No newline at end of file
-- 
Gitee


From 4ad3d996408455492abc25ae61ad0e676ccd7a4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=87=8C=E8=8A=9D?= <2054884274@qq.com>
Date: Sun, 29 May 2022 12:37:49 +0000
Subject: [PATCH 8/8] zz

---
 .../20220525-\347\275\221\347\253\231.md"     | 285 ++++++++++++++++++
 1 file changed, 285 insertions(+)
 create mode 100644 "\351\231\210\345\207\214\350\212\235/20220525-\347\275\221\347\253\231.md"

diff --git "a/\351\231\210\345\207\214\350\212\235/20220525-\347\275\221\347\253\231.md" "b/\351\231\210\345\207\214\350\212\235/20220525-\347\275\221\347\253\231.md"
new file mode 100644
index 0000000..7f32ae4
--- /dev/null
+++ "b/\351\231\210\345\207\214\350\212\235/20220525-\347\275\221\347\253\231.md"
@@ -0,0 +1,285 @@
+```mysql
+CREATE DATABASE student CHARSET utf8;
+use student;
+CREATE table user(
+id int PRIMARY key auto_increment,
+name VARCHAR(20) not null,
+score DECIMAL(5,2) not null
+);
+INSERT into user VALUES (1,"��С��",98.5),(2,"����",75.5),(3,"�µ�ʤ",66);
+```
+```php
+//conn.php
+<?php
+//error_reporting() ���� PHP �ı������𲢷��ص�ǰ����
+//E_ALL - ���еĴ���;���
+//E_WARNING - ����ʱ����
+error_reporting(E_ALL ^ E_WARNING);
+$conn=mysqli_connect("127.0.0.1","root","123456","student");
+mysqli_query($conn,'set names utf8');
+```
+```html
+//login.html
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>ѧ������ϵͳ��¼����</title>
+</head>
+<body>
+<h1>ѧ������ϵͳ��¼����</h1>
+<form action="login.php" method="post">
+    <table border="0" cellpadding="" cellspacing="">
+        <tr>
+            <td>�û�����</td><td><input type="text" name="username" ></td>
+        </tr>
+        <tr>
+            <td>���룺</td><td><input type="password" name="password" ></td>
+        </tr>
+        <!--<tr>-->
+            <!--<td> </td><td><input type="checkbox" name="auto" value="yes">7�����Զ���¼</td>-->
+        <!--</tr>-->
+        <tr>
+            <td><input type="submit" value="��¼"></td>
+        </tr>
+    </table>
+</form>
+</body>
+</html>
+```
+```php
+//login.php
+<?php
+session_start();
+// �ʺ�����
+$username = 'admin';
+$password = '123456';
+//var_dump($_POST);
+if($_POST['username']==$username && $_POST['password']==$password){
+    echo "��¼�ɹ���";
+    $_SESSION['username']=$username;
+//    if($_POST['auto']=='yes'){
+//        setcookie('username',"admin",time()+60*60*24*7);
+//    }
+//    header('location:index.php'); һ���ʺ���ȷ���Զ�������ҳ
+    echo "<a href ='index.php'>������ҳ</a>";
+}else{
+    echo "��¼ʧ�ܣ�<a href='login.html'>�����µ�¼</a>";
+}
+
+```
+```php
+//logout.php
+<?php
+// ע�����ܣ�����ɾ��session��Ӧ��ֵ
+session_start();
+unset($_SESSION['username']);
+setcookie('username','',time()-1);
+echo "ע���ɹ�";
+```
+```php
+//index.php
+<?php
+session_start();
+//isset �жϱ����Ƿ����
+if (!isset($_SESSION['username'])){
+//    die("��½ʧ��");
+    echo "��¼ʧ�ܣ�<br>";
+    echo "���ص�¼����<br><a href='login.html'>�����µ�¼</a>";
+    die();
+}
+include_once('conn.php');// �������ݿ��ļ�
+$sql = "select * from `user` order by id";// ��user������������ݲ�ѯ���������
+$result = mysqli_query($conn,$sql);//ִ����������,����һ�������
+?>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>
+        ѧ������ϵͳ
+    </title>
+    <script>
+        function del(){
+            if(!window.confirm("ȷ��Ҫɾ����")){
+                return false;
+            }
+        }
+    </script>
+</head>
+<body>
+<h1>ѧ������ϵͳ-��ҳ</h1>
+<table border="1" width="300">
+    <tr>
+        <th>���</th>
+        <th>����</th>
+        <th>�ɼ�</th>
+        <th>����</th>
+    </tr>
+    <?php
+    // ѭ��֮ǰ���������жϣ�������Ƿ�Ϊ�ա�
+    if(!mysqli_num_rows($result)) {//mysqli_num_rows() �������ؽ�������е�������
+        echo "<tr align='center'><td colspan='4'>�������ݣ�</td></tr>";
+    }else {
+    while ($row = mysqli_fetch_assoc($result)) {
+    ?>
+    <tr align="center">
+        <td><?php echo $row['id'] ?></td>
+        <td><?php echo $row['name'] ?></td>
+        <td><?php echo $row['score'] ?></td>
+        <td><a href="edit.php?id=<?php echo $row['id'] ?>">�޸�</a>|
+            <a href="delete.php?id=<?php echo $row['id'] ?>" onclick="return del();">ɾ��</a></td>
+    </tr>
+//onclick��html�е��÷���������¼�ִ�нű���onclick��HTML��Ƕ����һ�����ԣ�����걻����ʱִ���趨Ҫִ�е�javascript�ű���
+//onclick ������Ԫ���ϵ������������
+
+//ע�ͣ�onclick ���Բ���������Ԫ�أ�<base>��<bdo>��<br>��<head>��<html>��<iframe>��<meta>��<param>��<script>��<style> �� <title>��
+        <?php
+    }
+    }
+    ?>
+</table>
+<a href="add.php">��������</a>
+</body>
+</html>
+```
+```php
+//add.php
+<?php
+?>
+<html>
+<head>
+    <title>��������</title>
+</head>
+<h1>��������</h1>
+<form action="save.php" method="post">
+    <table border="1" width="300">
+        <tr>
+            <th>����</th><td><input type="text" name="name"></td>
+        </tr>
+        <tr>
+            <th>�ɼ�</th><td><input type="text" name="score"></td>
+        </tr>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="�ύ">&nbsp;&nbsp;&nbsp;&nbsp;
+                <input type="reset" value="ȡ��"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">����</a>
+
+</form>
+</html>
+```
+```php
+//edit.php
+<?php
+include_once ("./conn.php");
+if(!isset($_GET['id'])){
+    die("�Ƿ����ʣ�");
+}
+$id=$_GET['id'];
+
+$sql = "select * from `user` where `id`=$id";// �����ݿ��ѯidΪ$id������
+$result = mysqli_query($conn,$sql);
+$row = mysqli_fetch_assoc($result);
+?>
+<html>
+<head>
+    <title>�޸�����</title>
+
+</head>
+<h1>�޸�����</h1>
+<form action="update.php" method="post">
+    <table border="1" width="300">
+        <tr>
+            <th>����</th><td><input type="text" name="name" value="<?php echo $row['name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>�ɼ�</th><td><input type="text" name="score" value="<?php echo $row['score'] ?>"></td>
+        </tr>
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="�ύ">&nbsp;&nbsp;&nbsp;&nbsp;
+                <input type="reset" value="ȡ��"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">����</a>
+
+</form>
+</html>
+```
+```php
+//update.php
+<?php
+/**
+ * ���ձ������ݡ����ύ�����ݿ�
+ */
+// �������ݿ������ļ�
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("�Ƿ����ʣ�");
+}
+$id=$_POST['id'];//���
+$name=$_POST['name'];// ����
+$score=$_POST['score'];// �ɼ�
+// ����Ҫִ��sql��䡣
+$sql = "update `user` set `name`='$name',score=$score where id=$id";
+//echo $sql;
+// ִ��sql������
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "�޸ijɹ���<a href='./index.php'>������ҳ</a>";
+}else{
+    echo "�޸�ʧ�ܣ�";
+}
+```
+```php
+//delete.php
+<?php
+/**
+ * ���ձ������ݡ����ύ�����ݿ�
+ */
+// �������ݿ������ļ�
+
+include_once('conn.php');
+$id=$_GET['id'];//  �õ�Ҫɾ����ͼ��id
+
+
+// ����Ҫִ��sql��䡣
+$sql = "delete from `user` where id=$id";
+//echo $sql;
+// ִ��sql������
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "ɾ���ɹ���<a href='./index.php'>������ҳ</a>";
+}else{
+    echo "ɾ��ʧ�ܣ�";
+}
+```
+```php
+//save.php
+<?php
+/**
+ * ���ձ������ݡ����ύ�����ݿ�
+ */
+// �������ݿ������ļ�
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("�Ƿ����ʣ�");
+}
+
+$name=$_POST['name'];// ����
+$score=$_POST['score'];// �ɼ�
+// ����Ҫִ��sql��䡣
+$sql = "insert into `user` (name,score) values ('$name',$score)";
+//echo $sql;
+// ִ��sql������
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "���ӳɹ���<a href='./index.php'>������ҳ</a>";
+}else{
+    echo "����ʧ�ܣ�";
+}
\ No newline at end of file
-- 
Gitee