Example Analysis Ajax and PHP implementation without refresh verification mobile phone number

This article is mainly for you to share a ajax+php implementation of no-refresh verification of mobile phone number instances, with a good reference value, I hope to be helpful to everyone. Follow the small series together to see it, hope to help everyone.

A simple no-refresh verification phone number is registered:

Client implementations:

<! DOCTYPE html>
<?php$con = Mysqli_connect (' localhost ', ' username ', ' password '), if (! $con) {die (' Connection failed: '. Mysqli_error ($con));} mysqli_select_db ($con, ' bdm256727651_db '); $username = "Select username from Forms where username = ' $_post[name] '"; $ result = Mysqli_query ($con, $username), $rows =mysqli_num_rows ($result), if ($rows) {echo "phone number registered"; exit;} Else{echo "mobile phone number available";} Mysqli_close ($con)?>