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php 获取表单数据的实现方法

WBOY
WBOYOriginal
2016-05-25 16:46:291617browse

这是一篇基础的php入门教程,我们要告诉你如何利用php的相关函数来获取表单数据,在php提供了post,get,request三种方法来获取数据,我们最常用的就是$_POST,$_GET方法了,看$_REQUEST 变量,PHP 的 $_REQUEST 变量包含了 $_GET,$_POST 以及 $_COOKIE 的内容.

PHP 的 $_REQUEST 变量可用来取得通过 GET 和 POST 方法发送的表单数据的结果.

实例一:

 class="brush:php;"><html> 
	<head> 
	<title>An HTML Form that Calls Itself</title> 
	</head> 
	<body> 
	<div> 
	<?php 
	if ( ! emptyempty( $_POST[&#39;guess&#39;] ) ) { 
	    print "last guess: ".$_POST[&#39;guess&#39;]; 
	} 
	 
	<form method="post" action="<?php print $_SERVER[&#39;PHP_SELF&#39;]"> 
	<p> 
	Type your guess here: <input type="text" name="guess" /> 
	</p> 
	</form> 
	</div> 
	</body> 
	</html>

由于表的提供大量数据时我们尽量用post来获取,更复杂的实例二

实例二:

<?php 
	 
	$self = $_SERVER[&#39;PHP_SELF&#39;]; 
	$username = $_POST[&#39;username&#39;]; 
	$useraddr = $_POST[&#39;useraddr&#39;]; 
	$comments = $_POST[&#39;comments&#39;]; 
	$sent = $_POST[&#39;sent&#39;]; 
	 
	$form ="<form action="$self" method="post">"; 
	$form.="Name:<input type="text" name="username""; 
	$form.=" size="30" value="$username" >"; 
	$form.="Email:<input type="text" name="useraddr""; 
	$form.=" size="30" value="$useraddr">"; 
	$form.="Comments:<textarea name="comments" >"; 
	$form.="$comments</textarea><br/>"; 
	$form.="<input type="submit" name="sent" value="Send Form">"; 
	$form.="</form>"; 
	 
	if($sent) 
	{ 
	  $valid=true; 
	 
	  if( !$username ) 
	  { $errmsg.="Enter your name...<br />"; $valid = false; } 
	 
	  if( !$useraddr ) 
	  { $errmsg .="Enter your email address...<br />"; $valid = false; } 
	 
	  if( !$comments ) 
	  { $errmsg.="Enter your comments...<br />"; $valid = false; } 
	 
	  $useraddr = trim($useraddr); 
	  $_name = "/^[-!#$%&&#39;*+./0-9=?A-Z^_&#39;{|}~]+"; 
	  $_host = "([-0-9A-Z]+.)+"; 
	  $_tlds = "([0-9A-Z]){2,4}$/i"; 
	  if( !preg_match( $_name."@".$_host .$_tlds,$useraddr ) ) 
	  {  
	    $errmsg.="Email address has incorrect format!<br />"; 
	    $valid=false; 
	  } 
	} 
	 
	if($valid != true) 
	{ 
	  echo( $errmsg.$form ); 
	} 
	else 
	{ 
	  $to = "php@h.com"; 
	 
	  $re = "Feedback from $username"; 
	 
	  $msg = $comments; 
	 
	  $headers  = "MIME-Version: 1.0rn"; 
	  $headers .= "Content-type: text/html;";    
	  $headers .= "charset="iso-8859-1"rn"; 
	 
	  $headers .= "From: $useraddr rn"; 
	 
	  if(mail($to,$re,$msg, $headers)) 
	  { echo("Your comments have been sent - thanks $username");} 
	 
	}

上面可对用户提交的数据进行一些相关处理了,上只讲了$_POST

$_POST 变量

$_POST 变量是一个数组,内容是由 HTTP POST 方法发送的变量名称和值.

$_POST 变量用于收集来自 method="post" 的表单中的值,从带有 POST 方法的表单发送的信息,对任何人都是不可见的(不会显示在浏览器的地址栏),并且对发送信息的量也没有限制.

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