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Codice: Seleziona tutto

<?php
class Image
{
	private $check_ext;
	private $max_width, $max_height, $max_filesize;
	
	private $img;
	private $infos;
	
	private $q, $lo_q;
	
	function Image($img)
	{
		$this->img = $img;
		$this->check_ext = array("jpg", "jpe", "jpeg", "gif", "png");
		
		$this->get_infos();
	}
	
	function set_max_height($mh)
	{
		$this->max_height = $mh;
	}
	
	function no_max_height()
	{
		$this->max_height = 0;
	}
	
	function set_max_width($mw)
	{
		$this->max_width = $mw;
	}
	
	function no_max_width()
	{
		$this->max_width = 0;
	}
	
	function set_max_filesize($ms)
	{
		$this->max_filesize = $ms;
	}
	
	function no_max_filesize()
	{
		$this->max_filesize = 0;
	}
	
	function ext_accept($extensions) // str
	{
		$this->check_ext = explode(",", $extensions);
	}
	
	function get_extension()
	{
		$filename = basename($this->img);
		$ext = substr($filename, strrpos($filename, "."), strlen($filename));
		return $ext;
	}
	
	function get_content_type()
	{
		if(empty($this->infos))
		{
			$this->get_infos();
		}
		
		if($this->infos['width']!=0 && $this->infos['height']!=0)
		{
			return image_type_to_mime_type($this->infos['type']);
		}
		else
		{
			return false;
		}
	}
	
	function get_infos()
	{
		list($this->infos['width'], $this->infos['height'], $this->infos['type']) = getimagesize($this->img);
		$this->max_width = 0;
		$this->max_height = 0;
		$this->min_width = 10;
		$this->q = 100;
		$this->lo_q = 30;
	}
	
	function get_new_dimensions($width, $height, $max_width, $max_height = 0)
	{
		$new_width = $width;
		$new_height = $height;
		
		if($max_height!=0 && $max_width==0)
		{
			if($height > $max_height)
			{
				$new_height = $max_height;
				$new_width = round($width * $max_height / $height, 1);
			}
		}
		else if($max_width!=0 && $max_height==0)
		{
			if($width > $max_width)
			{
				$new_width = $max_width;
				$new_height = round($height * $max_width / $width, 1);
			}
		}
		else
		{
			if($max_height!=0 && $max_width!=0)
			{
				if($width >= $height
				&& $width >= $max_width)
				{
					$new_width = $max_width;
					$new_height = round($height * $new_width / $width, 1);
					if($new_height > $max_height)
					{
						$new_height2 = $max_height;
						$new_width2 = round($new_width * $new_height2 / $new_height, 1);
						$new_height = $new_height2;
						$new_width = $new_width2;
					}
				}
				else if($height >= $width
				&& $height >= $max_height)
				{
					$new_height = $max_height;
					$new_width = round($width * $new_height / $height, 1);
					if($new_width > $max_width)
					{
						$new_width2 = $max_width;
						$new_height2 = round($new_height * $new_width2 / $new_width, 1);
						$new_width = $new_width2;
						$new_height = $new_height2;
					}
				}
			}
		}
		
		return array($new_width, $new_height);
	}
	
	function create_thumb($source, $w_source, $h_source, $th_width, $th_height)
	{
		$thumb = $this->generate_thumb($source, $w_source, $h_source, $th_width, $th_height);
		
		// Reduce filesize
		if($this->max_filesize)
		{
			$thumb = $this->reduce_filesize($source, $thumb, $w_source, $h_source, $th_width, $th_height);
		}
		
		return $thumb;
	}
	
	function generate_thumb($source, $w_source, $h_source, $th_width, $th_height)
	{
		$thumb = imagecreatetruecolor($th_width, $th_height);
		imagecopyresampled($thumb, $source, 0, 0, 0, 0, $th_width, $th_height, $w_source, $h_source);
		return $thumb;
	}
	
	function get_filesize($img, $remote = 0)
	{
		if($remote)
		{
			// Not available yet
			return 0;
		}
		else
		{
			return filesize($img);
		}
	}
	
	function get_thumb_filesize($thumb)
	{
		$img = md5(time());
		switch($this->get_content_type())
		{
			case "image/jpeg":
				imagejpeg($thumb, $img, $this->q);
			break;
			case "image/gif";
				imagegif($thumb, $img);
			break;
			case "image/png";
				imagepng($thumb, $img);
			break;
		}
		if(file_exists($img))
		{
			$fs = $this->get_filesize($img);
			unlink($img);
			return $fs;
		}
		else
		{
			return 0;
		}
	}
	
	function reduce_filesize($source, $thumb, $w_source, $h_source, $th_width, $th_height)
	{
		$img = $this->img;
		switch($this->get_content_type())
		{
			case "image/jpeg":
				$tmp_imgs = array();
				
				do
				{
					$img = md5($img);
					$tmp_imgs[] = $img;
					imagejpeg($thumb, $img, $this->q);
					$this->q--;
				}
				while($this->get_filesize($img)>$this->max_filesize && $this->q>$this->lo_q);
				$last_filesize = $this->get_filesize($img);
				foreach($tmp_imgs as $ti)
				{
					unlink($ti);
				}
				
				// After reducing image quality, the filesize is still bigger than the limit 
				if($last_filesize>$this->max_filesize)
				{
					return $this->reduce_dimensions_by_filesize($source, $w_source, $h_source, $last_filesize);
				}
				else
				{
					return $thumb;
				}
			break;
			case "image/gif";
				return $thumb;
			break;
			case "image/png";
				return $thumb;
			break;
		}
	}
	
	function reduce_dimensions_by_filesize($source, $w_source, $h_source, $filesize)
	{
		$max_width = $this->max_width;
		
		while($filesize>$this->max_filesize && $max_width>$this->min_width)
		{
			$max_width -= 5;
			list($new_width, $new_height) = $this->get_new_dimensions($w_source, $h_source, $max_width, 0);
			$thumb = $this->generate_thumb($source, $w_source, $h_source, $new_width, $new_height);
			$filesize = $this->get_thumb_filesize($thumb);
		}
		
		return $thumb;
	}
	
	function resize($save_to_source = 1)
	{
		list($new_width, $new_height) = $this->get_new_dimensions($this->infos['width'], $this->infos['height'], $this->max_width, $this->max_height);
		if($new_height!=$this->infos['height'] || $new_width!=$this->infos['width'])
		{
			switch($this->get_content_type())
			{
				case "image/jpeg":
					$source = imagecreatefromjpeg($this->img);
					$thumb = $this->create_thumb($source, $this->infos['width'], $this->infos['height'], $new_width, $new_height);
					
					if($save_to_source)
					{
						imagejpeg($thumb, $this->img, $this->q);
						return true;
					}
					else
					{
						header("Content-Type: ".$this->get_content_type());
						imagejpeg($thumb, null, $this->q);
					}
				break;
				case "image/gif":
					$source = imagecreatefromgif($this->img);
					$thumb = $this->create_thumb($source, $this->infos['width'], $this->infos['height'], $new_width, $new_height);
					
					if($save_to_source)
					{
						imagegif($thumb, $this->img);
						return true;
					}
					else
					{
						header("Content-Type: ".$this->get_content_type());
						imagegif($thumb);
					}
				break;
				case "image/png":
					$source = imagecreatefrompng($this->img);
					$thumb = $this->create_thumb($source, $this->infos['width'], $this->infos['height'], $new_width, $new_height);
					
					if($save_to_source)
					{
						imagepng($thumb, $this->img);
						return true;
					}
					else
					{
						header("Content-Type: ".$this->get_content_type());
						imagepng($thumb);
					}
				break;
				default:
					// Do nothing
					return false;
			}
		}
	}
}
?>

Codice: Seleziona tutto

'avatar'      => ($user->optionget('viewavatars')) ? get_user_avatar($row['user_avatar'], $row['user_avatar_type'], $row['user_avatar_width'], $row['user_avatar_height']) : '',

Codice: Seleziona tutto

if($row['user_avatar_width'] > '120'){
$avatar_width = '120' ;
$avatar_height = ($row['user_avatar_height'] * '120' / ($row['user_avatar_width']) ;
} 

Codice: Seleziona tutto

'avatar'      => ($user->optionget('viewavatars')) ? get_user_avatar($row['user_avatar'], $row['user_avatar_type'], $avatar_width, $avatar_height) : '',
}