diff --git a/api.php b/api.php
index 5a8bf30..6a0c5e3 100644
--- a/api.php
+++ b/api.php
@@ -6,63 +6,72 @@ $js = $_GET['js'];
 $resizewidth = $_GET['width'];
 $cache = preg_replace("/[^A-Za-z0-9 ]/", '', $_GET['cache']);
 $onfail = rawurldecode($_GET['onfail']);
-if(!$onfail)
+
+if (!$onfail) {
 	$onfail = 'https://http2pic.haschek.at/img/failed.jpg';
+}
+
 $url = rawurldecode($_GET['url']);
-if(isBase64($url))
+if (isBase64($url)) {
 	$url = base64_decode($url);
+}
 
-if(!$timeout || !is_numeric($timeout) || ($timeout>30 || $timeout<1))
+if (!$timeout || !is_numeric($timeout) || ($timeout > 30 || $timeout < 1)) {
 	$timeout = 10;
+}
 
-if($viewport)
-{
-	$a=explode('x', $viewport);
+if ($viewport) {
+	$a = explode('x', $viewport);
 	$w = $a[0];
 	$h = $a[1];
-	if($w)
+	if ($w) {
 		$vp = "--width $w ";
-	if($h)
-		$vp.= "--height $h ";
-
+	}
+	if ($h) {
+		$vp .= "--height $h ";
+	}
 }	
 
-if($js=='no')
+if ($js == 'no') {
 	$jsp = '-n ';
+}
 
 switch ($type) {
 	case 'png':
-		$ft = $type;
+		$fileType = $type;
 		header('Content-Type: image/png');
-	break;
-
+		break;
 	case 'jpg':
 	case 'jpeg':
 	default:
-		$ft = 'jpg';
+		$fileType = 'jpg';
 		header('Content-Type: image/jpeg');
 }
 
+$hash = $cache.'-'.preg_replace("/[^A-Za-z0-9 ]/", '', $url).'.'.$fileType;
 
-
-$hash = $cache.'-'.preg_replace("/[^A-Za-z0-9 ]/", '', $url).'.'.$ft;
-if(!$cache)
+if (!$cache) {
 	$hash = md5(time().rand(1,2000)).$hash;
+}
 
-if(!is_dir(__DIR__.'/cache/'))
+if (!is_dir(__DIR__.'/cache/')) {
 	mkdir(__DIR__.'/cache/');
+}
+
 $file = __DIR__.'/cache/'.$hash;
-if(!file_exists($file))
-	shell_exec('timeout '.$timeout.' /usr/sbin/wkhtmltoimage '.escapeshellcmd($vp.$jsp.'-f '.$ft.' '.$url.' '.$file));
 
-if(filesize($file)==0 && $onfail)
+if (!file_exists($file)) {
+	shell_exec('timeout '.$timeout.' /usr/sbin/wkhtmltoimage '.escapeshellcmd($vp.$jsp.'-f '.$fileType.' '.$url.' '.$file));
+}
+
+if (filesize($file) == 0 && $onfail) {
 	@file_put_contents($file, file_get_contents($onfail));
+}
 
-if($resizewidth)
-{
+if ($resizewidth) {
 	list($width_orig, $height_orig) = getimagesize($file);
-	if($width_orig!=$resizewidth) 
-	{
+
+	if ($width_orig != $resizewidth) {
 		$ratio_orig = $width_orig/$height_orig;
 		$height = $resizewidth/$ratio_orig;
 
@@ -75,27 +84,25 @@ if($resizewidth)
 }
 
 
-if($ft=='jpg')
-{
-	$res = imagecreatefromjpeg($file);
-	imagejpeg($res,NULL,100);
+if ($fileType === 'jpg') {
+	$result = imagecreatefromjpeg($file);
+	imagejpeg($result, NULL, 100);
 }
-else if($ft=='png')
-{
-	$res = imagecreatefrompng($file);
-	imagepng($res,NULL,9);
+else if ($fileType === 'png') {
+	$result = imagecreatefrompng($file);
+	imagepng($result, NULL, 9);
 }
 
 
-imagedestroy($res);
+imagedestroy($result);
 
-if(!$cache)
+if (!$cache) {
 	unlink($file);
+}
 
-function isBase64($data)
-{
-	if ( base64_encode(base64_decode($data, true)) === $data)
+function isBase64($data) {
+	if (base64_encode(base64_decode($data, true)) === $data) {
 		return true;
-	else 
-		return false;
+	}
+	return false;
 }
\ No newline at end of file