<?php
$base64_url = 'data:image/png;base64,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';
preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_url, $result);
$type = $result[2];
$base64_body = substr(strstr($base64_url,','),1);
$img = base64_decode($base64_body);
$file_name_ok = md5(time()).".".$type;
file_put_contents($file_name_ok, $img);