将PHP转换为Javascript，jQuery或AJAX [关闭]

does any can convert my php code into JavaScript or j query or Ajax

this is my code

<?php 
    $string = '4617610105772019';
    $pattern = '/[0-9]{12}/';
    $replacement = 'xxxxxxx-';
    echo preg_replace($pattern, $replacement, $string); 
?>

the $string will be the text box inputted by the user

Try with .replace() like

var string = '4617610105772019';
var pattern = '/[0-9]{12}/';
var replacement = 'xxxxxxx-';
var result = string.replace(pattern, replacement); 
alert(result);

Read about the replace() here and Regular Expression concept here and try it yourself