functions.php

<?php
function createDir($path){		
	if (!file_exists($path)) {
		$old_mask = umask(0);
		mkdir($path, 0777, TRUE);
		umask($old_mask);
	}
}

function createThumb($path1, $path2, $file_type, $new_w, $new_h, $squareSize = ''){
	/* read the source image */
	$source_image = FALSE;
	
	if (preg_match("/jpg|JPG|jpeg|JPEG/", $file_type)) {
		$source_image = imagecreatefromjpeg($path1);
	}
	elseif (preg_match("/png|PNG/", $file_type)) {
		
		if (!$source_image = @imagecreatefrompng($path1)) {
			$source_image = imagecreatefromjpeg($path1);
		}
	}
	elseif (preg_match("/gif|GIF/", $file_type)) {
		$source_image = imagecreatefromgif($path1);
	}		
	if ($source_image == FALSE) {
		$source_image = imagecreatefromjpeg($path1);
	}

	$orig_w = imageSX($source_image);
	$orig_h = imageSY($source_image);
	
	if ($orig_w < $new_w && $orig_h < $new_h) {
		$desired_width = $orig_w;
		$desired_height = $orig_h;
	} else {
		$scale = min($new_w / $orig_w, $new_h / $orig_h);
		$desired_width = ceil($scale * $orig_w);
		$desired_height = ceil($scale * $orig_h);
	}
			
	if ($squareSize != '') {
		$desired_width = $desired_height = $squareSize;
	}

	/* create a new, "virtual" image */
	$virtual_image = imagecreatetruecolor($desired_width, $desired_height);
	// for PNG background white----------->
	$kek = imagecolorallocate($virtual_image, 255, 255, 255);
	imagefill($virtual_image, 0, 0, $kek);
	
	if ($squareSize == '') {
		/* copy source image at a resized size */
		imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $desired_width, $desired_height, $orig_w, $orig_h);
	} else {
		$wm = $orig_w / $squareSize;
		$hm = $orig_h / $squareSize;
		$h_height = $squareSize / 2;
		$w_height = $squareSize / 2;
		
		if ($orig_w > $orig_h) {
			$adjusted_width = $orig_w / $hm;
			$half_width = $adjusted_width / 2;
			$int_width = $half_width - $w_height;
			imagecopyresampled($virtual_image, $source_image, -$int_width, 0, 0, 0, $adjusted_width, $squareSize, $orig_w, $orig_h);
		}

		elseif (($orig_w <= $orig_h)) {
			$adjusted_height = $orig_h / $wm;
			$half_height = $adjusted_height / 2;
			imagecopyresampled($virtual_image, $source_image, 0,0, 0, 0, $squareSize, $adjusted_height, $orig_w, $orig_h);
		} else {
			imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $squareSize, $squareSize, $orig_w, $orig_h);
		}
	}
	
	if (@imagejpeg($virtual_image, $path2, 90)) {
		imagedestroy($virtual_image);
		imagedestroy($source_image);
		return TRUE;
	} else {
		return FALSE;
	}
}	
?>