svgScaleHack.php

<?php 
function svgScaleHack($svg, $minWidth, $minHeight)
{
  $reW = '/(.*<svg[^>]* width=")([\d.]+px)(.*)/si';
	$reH = '/(.*<svg[^>]* height=")([\d.]+px)(.*)/si';
	preg_match($reW, $svg, $mw);
	preg_match($reH, $svg, $mh);

	if(!isset($mw[2]) and isset($mh[2])){
		$mw[2] = $mh[2];
	}

	 if(empty($mw)){
$width = floatval($minWidth);
	$height = floatval($minHeight);
	 } else {
	 	$width = floatval($mw[2]);
	$height = floatval($mh[2]);
	 }

	if (!$width || !$height) return false;

    // scale to make width and height big enough
	$scale = 1;
	if ($width < $minWidth){
		$scale = $minWidth/$width;
	}
	if ($height < $minHeight){
		$scale = max($scale, ($minHeight/$height));
	}
	$scale = 1;
	//$width *= $scale*2;
	//$height *= $scale*2;

	$svg = preg_replace($reW, "\${1}{$width}px\${3}", $svg);
	$svg = preg_replace($reH, "\${1}{$height}px\${3}", $svg);

	return $svg;
}