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This class uses the GD library to do standard image operations like resizing, convert image type, fetch image dimensions and so on. Works with PNG, JPG and GIF image types.
| <?php
class Image
{
private $gd_info = array();
private $im = false;
private $info = array();
function Convert($type = 'jpg', $quality = null, $destination_folder = '.')
{
if (is_resource($this->im))
{
return $this->Transform($this->info['width'], $this->info['height'], $type, $quality, $destination_folder);
}
return false;
}
function GD_Info($flag = null)
{
if (extension_loaded('gd'))
{
$result = array();
if (empty($this->gd_info))
{
$this->gd_info = gd_info();
$this->gd_info['GD Bundled'] = true;
if (strpos(strtolower($this->gd_info['GD Version']), 'bundled') === false)
{
$this->gd_info['GD Bundled'] = false;
}
preg_match('([\d\.]+)', $this->gd_info['GD Version'], $match);
$this->gd_info['GD Version'] = $match[0];
}
if (!empty($flag))
{
if (array_key_exists($flag, $this->gd_info))
{
$result = $this->gd_info[$flag];
}
else
{
$result = false;
}
}
return $result;
}
return false;
}
function Info($flag = null, $image = null)
{
if (!empty($image))
{
if (is_file($image))
{
$image_info = getimagesize($image);
if ($image_info !== false)
{
$result = array();
list($result['width'], $result['height'], $result['type']) = $image_info;
$image_types = array('gif', 'jpg', 'png', 'swf', 'psd', 'bmp', 'tif', 'tif', 'jpc', 'jp2', 'jpx', 'jb2', 'swc', 'iff', 'wbmp', 'xbm');
if (($result['type'] >= 1) && ($result['type'] <= 16))
{
$result['type'] = $image_types[$result['type'] - 1];
}
if (!empty($flag))
{
if (array_key_exists($flag, $result))
{
$result = $result[$flag];
}
else
{
$result = false;
}
}
return $result;
}
}
return false;
}
if (is_resource($this->im))
{
$result = $this->info;
if (!empty($flag))
{
if (array_key_exists($flag, $this->info))
{
$result = $this->info[$flag];
}
else
{
$result = false;
}
}
return $result;
}
return false;
}
function Open($image)
{
if (!extension_loaded('gd'))
{
return false;
}
if (is_resource($this->im))
{
imagedestroy($this->im);
}
$this->im = false;
$this->info = array();
if (is_file($image))
{
$image_info = getimagesize($image);
if ($image_info !== false)
{
list($this->info['width'], $this->info['height'], $this->info['type']) = $image_info;
$image_types = array('gif', 'jpg', 'png', 'swf', 'psd', 'bmp', 'tif', 'tif', 'jpc', 'jp2', 'jpx', 'jb2', 'swc', 'iff', 'wbmp', 'xbm');
if (($this->info['type'] >= 1) && ($this->info['type'] <= 16))
{
$this->info['type'] = $image_types[$this->info['type'] - 1];
}
$this->info['hash'] = sha1_file($image);
if ($this->info['type'] == 'gif')
{
$this->im = imagecreatefromgif($image);
}
else if ($this->info['type'] == 'jpg')
{
$this->im = imagecreatefromjpeg($image);
}
else if ($this->info['type'] == 'png')
{
$this->im = imagecreatefrompng($image);
/*$transparent = imagecolorallocate($this->im, 255, 255, 255);
imagefill($this->im, 0, 0, $transparent);
imagecolortransparent($this->im, $transparent);*/
###################################
echo imagecolortransparent($this->im);
}
if (!is_resource($this->im))
{
$this->im = false;
$this->info = array();
}
}
}
return $this;
}
function Path($path)
{
if (file_exists($path))
{
$path = str_replace('\\', '/', realpath($path));
if (is_dir($path))
{
$path .= '/';
}
return $path;
}
return false;
}
function Resize($width = null, $height = null, $quality = null, $destination_folder = '.')
{
if (is_resource($this->im))
{
return $this->Transform($width, $height, $this->info['type'], $quality, $destination_folder);
}
return false;
}
function Transform($width = null, $height = null, $type = null, $quality = null, $destination_folder = '.')
{
if (is_resource($this->im))
{
if (!in_array($this->info['type'], array('gif', 'jpg', 'png')))
{
return false;
}
$width = intval($width);
$height = intval($height);
if ((empty($width)) && (empty($height)))
{
return false;
}
if (empty($width))
{
$width = round($height * $this->info['width'] / $this->info['height']);
}
if (empty($height))
{
$height = round($width * $this->info['height'] / $this->info['width']);
}
$type = strtolower($type);
if ((empty($type)) || (!in_array($type, array('gif', 'jpg', 'png'))))
{
$type = $this->info['type'];
}
if (is_null($quality))
{
$quality = 100;
}
$quality = intval($quality);
if ($type == 'jpg')
{
if (($quality < 0) || ($quality > 100))
{
$quality = 100;
}
}
else
{
$quality = 100;
}
$destination_folder = $this->Path($destination_folder);
if (!is_dir($destination_folder))
{
return false;
}
$destination_image = sha1($this->info['hash'] . $width . $height . $quality) . '.' . $type;
if (file_exists($destination_folder . $destination_image))
{
return $destination_image;
}
if (version_compare($this->GD_Info('GD Version'), '2.0.28', '>='))
{
$image = imagecreatetruecolor($width, $height);
if ($this->GD_Info('GD Bundled') === true)
{
imageantialias($image, true);
}
imagecopyresampled($image, $this->im, 0, 0, 0, 0, $width, $height, $this->info['width'], $this->info['height']);
}
else
{
$image = imagecreate($width, $height);
if ($this->GD_Info('GD Bundled') === true)
{
imageantialias($image, true);
}
imagecopyresized($image, $this->im, 0, 0, 0, 0, $width, $height, $this->info['width'], $this->info['height']);
}
if ($type == 'gif')
{
if (imagegif($image, $destination_folder . $destination_image) !== false)
{
imagedestroy($image);
return $destination_image;
}
}
else if ($type == 'jpg')
{
imageinterlace($image, true);
if (imagejpeg($image, $destination_folder . $destination_image, $quality) !== false)
{
imagedestroy($image);
return $destination_image;
}
}
else if ($type == 'png')
{
if (imagepng($image, $destination_folder . $destination_image) !== false)
{
imagedestroy($image);
return $destination_image;
}
}
return false;
}
return false;
}
}
?> | |
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| | | | Joshua Walcher wrote : 1784
If you're going to add a class again, would you add usage
examples as comments in your code? Unless, of course,
you're just using this site as a depository for your own
code and don't care about other users using the code. If
that's the case, no worries!
| | | | Alix Axel wrote : 1785
It seems pretty straightforward to me, however for the sake of a few examples here they are:
<?php
$Image = new Image();
// Convert an image:
$Image->Open('/path/to/image.jpg')->Convert('png');
// Resize an image (proportional height):
$Image->Open('/path/to/image.jpg')->Resize(400);
// Resize an image (proportional width):
$Image->Open('/path/to/image.jpg')->Resize(null, 400);
// Resize an image (forced width and height):
$Image->Open('/path/to/image.jpg')->Resize(400, 400);
?>
| | | | Joshua Walcher wrote : 1787
Thanks!
| | | | m d wrote : 1789
Those examples work out pretty cool, except this: "f97faa4505727aebb7323ad2dc5b5a72879aae89"
Image name:"image.jpg"
$Image->Open('image.jpg')->Convert('png');
afterwards: "f97faa4505727aebb7323ad2dc5b5a72879aae89.png"
How to retain the filename or rather just append it with a "_" like this "image_.png"
Cheers
| | | | Alix Axel wrote :1791
Hi, to do that you must change the following code:
<?php
// On the Open() method change this:
$this->info['hash'] = sha1_file($image);
// to:
$this->info['hash'] = pathinfo($image, PATHINFO_FILENAME) . '_';
// On the Transform() method change this:
$destination_image = sha1($this->info['hash'] . $width . $height . $quality) . '.' . $type;
// to:
$destination_image = $this->info['hash'] . '.' . $type;
?>
I haven't tested but it should work.
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