Function to create thumbnails (from 2007)

thumb_create.php

<?php

function thumb_create($p_photo_file, $p_thumb_file, $p_max_size, $p_quality=60)
{
	$pic = @imagecreatefromjpeg($p_photo_file);

	if ($pic)
	{
		$thumb = @imagecreatetruecolor($p_max_size, $p_max_size) or die ("Can't create Image!");
		$width = imagesx($pic);
		$height = imagesy($pic);

		if ($width < $height)
		{
			$twidth = $p_max_size;
			$theight = $twidth * $height / $width;
			imagecopyresampled($thumb, $pic, 0, 0, 0, ($height/2)-($width/2), $twidth, $theight, $width, $height);
		}
		else
		{
			$theight = $p_max_size;
			$twidth = $theight * $width / $height;
			imagecopyresampled($thumb, $pic, 0, 0, ($width/2)-($height/2), 0, $twidth, $theight, $width, $height);
		}

		imagejpeg($thumb, $p_thumb_file, $p_quality);
	}
}