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初识PHP_php基础

May 17, 2016 am 08:59 AM
php First acquaintance

1.在PHP中,全局变量都要大写;

2.在PHP表单提交方式中,method属性设置了获取和提交数据的方式;

3.如果在表单中使用了上传元素,那么就要给表单添加属性:enctype="multipart/form-data";

4.注销用户功能的实现:

复制代码 代码如下:

        session_start();  //启动会话
      unset($_SESSION['user']);  //删除单个会话
      unset($_SESSION['pwd']);   //删除单个会话
      session_destory();         //结束当前回话
      header("location:index.php");  //重定向
  ?>

  删除多个会话:$_SESSION=array();

5.php中遍历对象:

复制代码 代码如下:

  for($i=0;$i       //处理
  }

6.php中包含文件:include("文件路径");

7.在HTML页面中嵌入js脚本的方式:

复制代码 代码如下:

 

8.在php动态页面中引用JS文件:

复制代码 代码如下:

 
  或是:
 

9.解决浏览器不支持JavaScript问题:
  a.开启IE浏览器对JavaScript的支持;
  b.开启IE浏览器对本地JavaScript的支持;
  c.应用注释符号验证浏览器是否支持JavaScript脚本功能;
  d.应用标记验证浏览器是否支持JavaScript脚本。

10.在php中,单引号和双引号的处理机制是不同的,他们的区别:
  双引号的内容可以被解释和替换,而单引号的北荣则被作为普通字符进行处理。如:

复制代码 代码如下:

        $test="PHP";
      $str1="I like $test";
      $str2='I like $test';
      echo $str;    //输出:I like PHP;
      echo $str;    //输出:I like $test; 
  ?>
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