PHP ?? - ?? ??? ? URL
??? ? ???? ??? ???:
???
???? ??? ??? ???? ?????. ??? ??? ???? ?? ??? ?? ?? ?????.
PHP??? preg_match ??? ?????. ??? ??? ?????. ??? ????? ??? ???? ? ?? ????? ??? ??????.
preg_match ( string $regular, string $character string[, array &$result] )
??: $regular ??? ???? $string ??? ??????. ???? ?? ?? ?? ?? ???? ??? ??? $result ??? ????. ??? ??? 0? ?????.
^? ??? ???? $? ??? ?????
??? ???????.
<?php
header("Content-type:text/html;charset=utf-8"); //設(shè)置編碼
$str = 'date20150121';
if (preg_match('/^date/', $str)) {
echo '匹配成功';
} else {
echo '匹配失敗';
}
?>
? ??? ??? ???? ??? ?????. ?? ??? ??? ????.
?? ??
preg_matchede? ? ?? ???? ???? ???? ?? ????? ??? ???? ??? ? ??? ?????. ??? ??? ? ?? ?? ???
????
<?php
header("Content-type:text/html;charset=utf-8"); //設(shè)置編碼
$str = 'date20150121';
if (preg_match('/^date/', $str,$mat)) {
print_r($mat);
} else {
echo '匹配失敗';
}
?>???? ?????. ???? ?? ??:
?? ( [0] => ?? )
?? ????? ??? w? ???? ??? d? ?????(D? ??? ?? ?? ???). ?? ??? ???
? * ? 0 ??? ??
? ?? ??? ??? ??
? {n} ? ?? ??? ?????.
? {m, n} ? m?? ?? n?? ????.
??? ????: <?php
header("Content-type:text/html;charset=utf-8"); //設(shè)置編碼
$name = "zhang"; // wang zhu hu ma tan
if (preg_match('/an|hu/', $name, $arr)) {
print_r($arr);
} else {
echo '匹配失敗';
}
?>???? ?? ??:
Array ( [0] => )
[]? ??? ? ????. ??? ? ??? ?????.?? ??? ???? ???? ???? ? ????. ?? ?? ?? ??? ?? ?? ??? ??? ? ????
'/[a0.]/'? a, 0 ?? ? ???? ?? ???? ??? ? ????.
?? ?? ?????? -? ??? ?? ????. to ?? ??? ?????
? [a-z] 26?? ??? ? ??? ?????
? [A-Z] ???? ?????
? [0-9] ??? ????
?? ?? ????, ???? ???? ??? ??? ????? ??? ???????.
PHP - ??? ?? ???? ??? ?? ??? ??? ??? ???? ??? ??? ??? ???? ?????. ?? ?? ?? ??? ?? ?? ???? ?????. $name = test_input($_POST["name"]); PHP - ?? ??? ??: ??? ??? ??, ??, ??, ??? ??? ?? ??? ? ????. ????? @ ??? ?? ???? ????? ???. ??? ?? ?? ?? ??? ??? ??? ????? ??? ??? ???? ?????. ??? ??? ??? ?? ?? ???? ?????: $email = test_input($_POST["email"]); PHP - URL ?? ?? ??? URL ??? ???? ?????(?? ?? ??? ?? URL?? ??: "-"? ???? ??). URL ??? ??? ?? ?? ???? ?????. $website = test_input ($_POST["website"]); ?? ??? ?? ??? ???? ??? ???? ???????. ??? ??? ??? ?? ???? ??? ?? ????? ?????. ??? ??? ???? ??? ????? ???? ???? ??? ??? ???? ?? ????. ??.
if (!preg_match("/^[a-zA-Z]*$/",$name) ) {
$nameErr = "??? ??? ?????.";
}
if (!preg_match( "/^ [a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(.[a-zA-Z0-9_-]+)+$/",$email)) {
$emailErr = "??? ??? ??!";
}
if (!preg_match("/b(?:(?:https?|ftp)://|www.)[-a- z0-9+&@# /%?=~_|!:,.;]*[-a-z0-9+&@#/%
=~_|]/i",$website)) {
$websiteErr = "??? URL";
}<!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"]);
// 檢查姓名是否包含字母和空白字符
if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
$nameErr = "只允許字母和空格";
}
}
if (empty($_POST["email"])) {
$emailErr = "電郵是必填的";
} else {
$email = test_input($_POST["email"]);
// 檢查電子郵件地址語(yǔ)法是否有效
if (!preg_match("/^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/",$email)) {
$emailErr = "無(wú)效的 email 格式";
}
}
if (empty($_POST["website"])) {
$website = "";
} else {
$website = test_input($_POST["website"]);
// 檢查 URL 地址語(yǔ)法是否有效（正則表達(dá)式也允許 URL 中的斜杠）
if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
$websiteErr = "無(wú)效的 URL";
}
}
if (empty($_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 $data;
}
?>
<h2>PHP 驗(yàn)證實(shí)例</h2>
<p><span class="error">* 必需的字段</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
姓名：<input type="text" name="name">
<span class="error">* <?php echo $nameErr;?></span>
<br><br>
郵箱：<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(píng)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>
