<?php
$input = "textmdwrhfejhg../0005456,2222233333,34erw.re.ty";
 
//Here's mine :
$repl1 = preg_replace("/[^0-9,.]/", "", $input);
//following line just removes one zero, i want it to remove all chars like
//Input : 000549,569     Output : 549,569
$repl2 = preg_replace("/^0/", "",$repl1);
$repl3 = str_replace(".","",$repl2);
preg_match('/[0-9]+(?:\,[0-9]{2}){0,2}/', $repl3, $matches);
$repl4 = preg_replace('/(\d)(?=(\d{3})+(?!\d))/', '$1.', $matches[0]);
echo $repl4;

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