PHP ?? - ?? ?? ??
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PHP - ?? ??
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?? ??? ??? ??? ?? ??? ??????. "??", "???" ? "??" ??? ?? ?????. ?? ?????.
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| ??? | ???????. + ??? ??? ???? ???('@' ? '.' ??). |
?? ????? ???? ???? ??? ??? ?? ?? ??? ?? ???????.
?? ???? $nameErr, $emailErr, $genderErr ? $websiteErr?? ? ?? ??? ??? ???????. ??? ?? ??? ?? ??? ?????. ?? ? $_POST ??? ?? if else ?? ??????. ? ???? $_POST ??? ?? ??? ?????(PHP? empty() ?? ??). ?? ??? ?? ?? ???? ?????. ?? ?? ??? ???? test_input() ??? ?????:
<?php
// 定義變量并默認(rèn)設(shè)為空值
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "名字是必需的。";
} else {
$name = test_input($_POST["name"]);
}
if (empty($_POST["email"])) {
$emailErr = "郵箱是必需的。";
} else {
$email = test_input($_POST["email"]);
}
if (empty($_POST["website"])) {
$website = "";
} else {
$website = test_input($_POST["website"]);
}
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"]);
}
}
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??? ?? ??? ?? ?? ???? ??? ? ????. ??? ????.
PHP - ?? ??? ??
?? HTML ?? ????? ? ??? ?? ?? ????? ??????. ? ????? ??? ?? ???? ??? ?????. ??. (???? ??? ???? ?? ??? ???? ?? ???? ?????.):
?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>PHP中文網(wǎng)</title>
</head>
<style>
.error {color: #FF0000;}
</style>
<body>
<?php
// 定義變量并設(shè)置為空值
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "姓名是必填的";
} else {
$name = test_input($_POST["name"]);
}
if (empty($_POST["email"])) {
$emailErr = "電郵是必填的";
} else {
$email = test_input($_POST["email"]);
}
if (empty($_POST["website"])) {
$website = "";
} else {
$website = test_input($_POST["website"]);
}
if (empty($_POST["comment"])) {
$comment = "";
} else {
$comment = test_input($_POST["comment"]);
}
if (empty($_POST["gender"])) {
$genderErr = "性別是必選的";
} else {
$gender = test_input($_POST["gender"]);
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<h2>PHP 驗證實例</h2>
<p><span class="error">* 必需的字段</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
姓名：<input type="text" name="name">
<span class="error">* <?php echo $nameErr;?></span>
<br><br>
電郵：<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>
評論：<textarea name="comment" rows="5" cols="40"></textarea>
<br><br>
性別：
<input type="radio" name="gender" value="female">女性
<input type="radio" name="gender" value="male">男性
<span class="error">* <?php echo $genderErr;?></span>
<br><br>
<input type="submit" name="submit" value="提交">
</form>
<?php
echo "<h2>您的輸入：</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>
</body>
</html>
?? ??? ??? ???? ?? *? ?? ???? ???? ?? ???? ?????.
?????.
?? ??? ?? ???? ???? ????. ?, "?? ??? ??? ??? ???? ?????", "??? ??? ??? ??? ?? ??? ???? ?????" ???? ??? "? ??? ??? URL? ???? ?????"? ?????.
