PHP form Check function library (determine whether the email format is correct, HTTP address is valid, mobile phone number is legitimate)

Source: Internet
Author: User
Tags php form
/** * form Check function library *//** * Determine if the email format is correct * @param $email */function is_email ($email) {    return strlen ($email) > 6 &&A mp Preg_match ("/^[\w\-\.") [Email protected] [\w\-\.] + (\.\w+) +$/", $email);} Determines whether the HTTP address is legal function Check_url ($url) {    return Preg_match ("/^[a-z0-9][a-z0-9\-]+[a-z0-9" (\.[ a-z]{2,4}) +$/i ", $url);} Determines whether the HTTP address is valid function url_exists ($url) {    $head = @get_headers ($url);    Return Is_array ($head)?  True:false;} function Is_tel ($tel) {    return strlen ($tel) = = && Preg_match ('/^ (?: 13\d{9}|15[0|1|2|3|5|6|7|8| 9]\d{8}|18[0|2|3|5|6|7|8| 9]\D{8}|14[5|7]\D{8}) $/', $tel);}

PHP form Check function library (determine whether the email format is correct, HTTP address is valid, mobile phone number is legitimate)

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.