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php $_POST[]获取表单数据方法

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May 25, 2016 pm 04:46 PM

獲取表單數據

在php获取表单数据有专用的命令,$_POST[]就是这个函数了,下面来看我们一个简单的实例:

<?php 
	echo &#39;Hello, &#39; . $_POST[&#39;first_name&#39;] . &#39;!&#39;;

输出是来自表单的first_name的值,再看一个复杂一点点的实例:

$_POST['name'] = trim($_POST['name']); 
	 
	if (strlen($_POST['name']) == 0) { 
	    $errors[] = "Your name is required."; 
	}

好了,下面做一个关于$_POST的完整实例:

 class="brush:php;"><?php  
	  $user =  $_POST[&#39;user&#39;]; 
	  $color = $_POST[&#39;color&#39;]; 
	  $self =  $_SERVER[&#39;PHP_SELF&#39;]; 
	 
	  if( ( $user != null ) and ( $color != null ) ) 
	  { 
	    setcookie( "firstname", $user , time() + 36000 ); 
	    setcookie( "fontcolor", $color, time() + 36000 ); 
	    header( "Location:getcookie.php" ); 
	    exit(); 
	  } 
	 
	<html> 
	 <head> 
	  <title>Set Cookie Data</title> 
	 </head> 
	 <body> 
	 
	  <form action ="<?php echo( $self ); " method = "post"> 
	 
	  Please enter your first name: 
	  <input type = "text" name = "user"><br><br> 
	 
	  Please choose your favorite font color:<br> 
	  <input type = "radio" name = "color" value = "#FF0000">Red 
	  <input type = "radio" name = "color" value = "#00FF00">Green 
	  <input type = "radio" name = "color" value = "#0000FF">Blue 
	  <br><br> 
	  <input type = "submit" value = "submit"> 
	  </form> 
	 
	 </body> 
	 
	</html>

总结:上面的实例没做安全处理，只是简单的获取了表单提交的数据，我们可以做一些安全处理，如isset() addslashes 等处理.

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