php 获取表单数据的实现方法

时间：2015-01-23 来源：西部数据作者：西部数据

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:

<html>

<head>

<title>An HTML Form that Calls Itself</title>

</head>

<body>

<div>

<?php

if ( ! emptyempty( $_POST['guess'] ) ) {

print "last guess: ".$_POST['guess'];

}

?>

<form method="post" action="<?php print $_SERVER['PHP_SELF']?>">

<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['PHP_SELF'];

$username = $_POST['username'];

$useraddr = $_POST['useraddr'];

$comments = $_POST['comments'];

$sent = $_POST['sent'];

$form ="<form action="$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);

  $_name = "/^[-!#$%&'*+./0-9=?A-Z^_'{|}~]+";

  $_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");}

}

?>