?? PHP ?? ????: ?? ?? ??? ? URL
1. ??, ???, URL ??
? ????? ??, ???, URL? ???? ??? ?????.
2. ?? ??
?? ??? ?? ??? ??? ??? ???? ??? ???? ??? ??? ?????. ?? ?? ???? ??? ?? ???? ?????:
$name = test_input($_POST["name"]);
if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
$nameErr = "只允許字母和空格";
}??:
preg_match — ??? ??? ?????.
??: int preg_match ( string $pattern , string $subject [, array $matches [, int $flags ]] )
in ???? ??? ???? ???? ???? ?? ?? ???? ?????. ???? ??? ???? ?? ??? ?????. $matches[0]?? ?? ??? ???? ???? ????, $matches[1]?? ?? ?? ? ?? ??? ?? ??? ???? ???? ?????.
PHP ????? ???? ??? ?????? ??????.
3. ?? ???
?? ??? ??? ??? ????? ??? ???? ?????. ??? ??? ??? ??
$email = test_input($_POST["email"]);
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
$emailErr = "非法郵箱格式";
}?? ?? ???? ?????. 4. URL ??
?? ??? ?????. URL ??? ???? ??(?? ?? ??? ?? URL?? ??? ???? ????: "-"). URL ??? ??? ??
$website = test_input($_POST["website"]);
if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
$websiteErr = "非法的 URL 的地址";
}?? ???? ?????. . ??, ???, URL
??? ?????:
<?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 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"]);
}
}
?>
