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$name = test_input($_POST["name"]);

if (!preg_match("/^[a-zA-Z ]*$/" ,$name) )

{
$nameErr = "??? ??? ?????."

}

preg_match — ??? ??? ?????.

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int preg_match ( string $pattern , string $subject [, array $matches [, int $flags ]] )

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PHP - ?? ???

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$email = test_input($_POST["email"]);

if (!preg_match("/([w-]+@[w-]+.[w-]+)/",$email))

{

$emailErr = "??? ??? ??";
} - URL ??

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$website = test_input($_POST["website"]);

if (!preg_match("/b(?:( ?:https?|ftp)://| www.)[-a-z0-9+&@#/%?=~_|!:,.;]*[-a-z0-9+&@# /%=~_|]/i", $website))

{

$websiteErr = " ?? URL ??";}

PHP - ??, ???, URL ??

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<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>PHP中文網(wǎng)</title> <style> .error {color: #FF0000;} </style> </head> <body> <?php // 定義變量并默認(rèn)設(shè)置為空值 $nameErr = $emailErr = $genderErr = $websiteErr = ""; $name = $email = $gender = $comment = $website = ""; if ($_SERVER["REQUEST_METHOD"] == "POST") { if (empty($_POST["name"])) { $nameErr = "Name is required"; } else { $name = test_input($_POST["name"]); // 檢測(cè)名字是否只包含字母跟空格 if (!preg_match("/^[a-zA-Z ]*$/",$name)) { $nameErr = "只允許字母和空格"; } } if (empty($_POST["email"])) { $emailErr = "Email is required"; } else { $email = test_input($_POST["email"]); // 檢測(cè)郵箱是否合法 if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) { $emailErr = "非法郵箱格式"; } } if (empty($_POST["website"])) { $website = ""; } else { $website = test_input($_POST["website"]); // 檢測(cè) URL 地址是否合法 if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) { $websiteErr = "非法的 URL 的地址"; } } if (empty($_POST["comment"])) { $comment = ""; } else { $comment = test_input($_POST["comment"]); } if (empty($_POST["gender"])) { $genderErr = "性別是必需的"; } else { $gender = test_input($_POST["gender"]); } } function test_input($data) { $data = trim($data); $data = stripslashes($data); $data = htmlspecialchars($data); return $data; } ?> <h2>PHP 表單驗(yàn)證實(shí)例</h2> <p><span class="error">* 必需字段。</span></p> <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> 名字: <input type="text" name="name"> <span class="error">* <?php echo $nameErr;?></span> <br><br> E-mail: <input type="text" name="email"> <span class="error">* <?php echo $emailErr;?></span> <br><br> 網(wǎng)址: <input type="text" name="website"> <span class="error"><?php echo $websiteErr;?></span> <br><br> 備注: <textarea name="comment" rows="5" cols="40"></textarea> <br><br> 性別: <input type="radio" name="gender" value="female">女 <input type="radio" name="gender" value="male">男 <span class="error">* <?php echo $genderErr;?></span> <br><br> <input type="submit" name="submit" value="Submit"> </form> <?php echo "<h2>您輸入的內(nèi)容是:</h2>"; echo $name; echo "<br>"; echo $email; echo "<br>"; echo $website; echo "<br>"; echo $comment; echo "<br>"; echo $gender; ?> </body> </html>

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