validation for php
Possible Duplicate:
Is there a php library for email address validation?
How can I create a validation for email address?
使用过滤器
<?php
$email_a = 'joe@example.com';
$email_b = 'bogus';
if (filter_var($email_a, FILTER_VALIDATE_EMAIL)) {
echo "This (email_a) email address is considered valid.";
}
if (filter_var($email_b, FILTER_VALIDATE_EMAIL)) {
echo "This (email_b) email address is considered valid.";
}
?>
If you're looking for full control, you can test the email against a regular expression of your own requirements. You can accomplish this using PHP's preg_match() method.
Example:
<?php
echo preg_match('/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+.([a-zA-Z])+([a-zA-Z])+$/', 'bob@example.com');
?>
If the email address is valid, preg_match will return 1. Otherwise, preg_match will return a value of 0.
-OR- Use PHP's built in filter:
<?php
echo filter_var('bob@example.com', FILTER_VALIDATE_EMAIL);
?>
Of'course, I've seen many people state that FILTER_VALIDATE_EMAIL is not enough, and return to regular expressions.
You can learn more about PHP regular expressions here: http://php.net/manual/en/book.regex.php
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