php $_POST[]获取表单数据方法_php教程

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 'Hello, ' . $_POST['first_name'] . '!';

?>

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:

<?php

  $user =  $_POST['user'];

  $color = $_POST['color'];

  $self =  $_SERVER['PHP_SELF'];

  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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