[英]PHP Regex Problem (username, birthdate, email address)
下面的正則表達式似乎不起作用。 是因為!preg_match嗎?
用戶名
if (!preg_match("/^[A-Za-z](?=[A-Za-z0-9_.]{3,31}$)[a-zA-Z0-9_]*\.?[a-zA-Z0-9_]*$/",$_POST['username'])) {
$hasErr = true;
$return['username'] = 'Please enter a valid username. Use 4 to 32 characters '
. 'and start with a letter. You may use letters, numbers, '
. 'underscores, and one dot (.).';
}
生日
if (!preg_match("'\b(0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}\b'", $_POST['birthdate'])) {
$hasErr = true;
$return['birthdate'] = 'Please enter your birthdate in a valid format. mm/dd/yyy';
}
電子郵件地址
if (!preg_match("'\b[A-Z0-9._%-]+@(?:[A-Z0-9-]+\.)+[A-Z]{2,4}\b'",$_POST['email'])) {
$hasErr = true;
$return['email'] = 'Please enter a valid email address.';
}
這就是我要做的
<?php
// remove whitespaces
array_walk($_POST, 'trim');
function validate() {
$return = array();
if (!preg_match('/^[A-Za-z](?=[A-Za-z0-9_.]{3,31}$)[a-zA-Z0-9_]*\.?[a-zA-Z0-9_]*$/',$_POST['username'])) {
$return['username'] = 'Please enter a valid username. Use 4 to 32 characters '
. 'and start with a letter. You may use letters, numbers, '
. 'underscores, and one dot (.).';
}
if (!preg_match('/^(0?[1-9]|1[012])[- .\/](0?[1-9]|[12][0-9]|3[01])[- .\/](19|20)?[0-9]{2}$/', $_POST['birthdate'])) {
$return['birthdate'] = 'Please enter your birthdate in a valid format. mm/dd/yyy';
}
// email regexes are pretty problematic
if (!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
$return['email'] = 'Please enter a valid email address.';
}
return (empty($return)) ? true : $return;
}
echo '<pre>';
var_dump(validate());
echo '</pre>';
?>
注意:我沒有檢查您的用戶名正則表達式。
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