base64ToPng.php

<?php
function base64_to_png ($img, $im_name)  {
    if ( ($fp = fopen($im_name . '.png', 'wb')) === false ) {
	return false;
    }
    $img = str_replace('data:image/png;base64,', '', $img); 	
	$img = str_replace(' ', '+', $img);
	if ( fwrite($fp, base64_decode($img)) === false ) {
	    return false;
	}
     fclose($fp);
     return true;
}