10c06-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 45 行

<?php
// An array of our required elements, and their real names:
$required = array('phone' => 'Phone Number', 'state' => 'State');

// If we had a POST, then check the data:
if (count($_POST)) {
    $errors = '';
    // Loop over all required fields, and ensure they exist:
    foreach ($required as $field => $desc) {
        // If it is not even set, or is blank after trimming:
        if (!isset($_POST[$field]) || (trim($_POST[$field]) === '')) {
            $errors .= "<br />{$desc} is a required field!\n";
        }
    }

    // If we had any errors, echo them out now:
    if ($errors) {
        echo "<p style=\"color: red\">The following errors were found:
{$errors}</p>\n";
    } else {
        // Here, if this were a real program, you would save your data or 
        //  do whatever else you would normally do with it.  Probably 
        //  redirecting to a different page afterwards.
    }
}

// Create our form autopopulating the POST variables back into place if
//  they exist.  Using @ to hide errors if they didn't exist.
?>
<form action="<?= $_SERVER['PHP_SELF'] ?>" method="post" name="f1">
<p>Please enter your contact information:</p>
<p>Name:
<input name="name" type="text" value="<?= @$_POST['name'] ?>" /></p>
<p>Phone:
<input name="phone" type="text" value="<?= @$_POST['phone'] ?>" /></p>
<p>Email:
<input name="email" type="text" value="<?= @$_POST['email'] ?>" /></p>
<p>Address:
<input name="address" type="text" value="<?= @$_POST['address'] ?>" /></p>
<p>City:
<input name="city" type="text" value="<?= @$_POST['city'] ?>" /></p>
<p>State:
<input name="state" type="text" value="<?= @$_POST['state'] ?>" /></p>
<p><input type="submit" /></p>
</form>