Практически во всех проектах требуется задача по изменению размера стандартного изображения, до необходимых нам размеров. В этой статье рассмотрим варианты для изменения размеров изображений на чистом PHP, для CMS 1С-Битрикс и решение для MODx.
resize изображений на PHP
Нашел для себя такой код и часто использую его в своих проектах, с различными нужными доработками.
<?php
class SimpleImage
{
public $nativeimg;
public $image;
public $image_type;public function load($filename)
{
$image_info = getimagesize($filename);
$this->image_type = $image_info[2];if( $this->image_type == IMAGETYPE_JPEG )
{
$this->nativeimg = imagecreatefromjpeg($filename);
if($this->getHeight() < $this->getWidth())
$this->exifrotate($filename);
return true;
}
elseif( $this->image_type == IMAGETYPE_GIF )
{
$this->nativeimg = imagecreatefromgif($filename);
return true;
}
elseif( $this->image_type == IMAGETYPE_PNG )
{
$this->nativeimg = imagecreatefrompng($filename);
return true;
}
else
return false;}
public function save($filename, $image_type=IMAGETYPE_JPEG, $compression=90, $owner=null, $permissions=null)
{
if( $image_type == IMAGETYPE_JPEG )
{
imagejpeg($this->image,$filename,$compression);
}elseif( $image_type == IMAGETYPE_GIF )
{
imagegif($this->image,$filename);
}
elseif( $image_type == IMAGETYPE_PNG )
{
imagepng($this->image,$filename);
}if( $permissions != null)
{
chown($filename, $permissions);
}if( $permissions != null)
{
chmod($filename, $owner);
}
}public function output($image_type=IMAGETYPE_JPEG)
{
if( $image_type == IMAGETYPE_JPEG )
{
imagejpeg($this->image);
}
elseif( $image_type == IMAGETYPE_GIF )
{
imagegif($this->image);
}
elseif( $image_type == IMAGETYPE_PNG )
{
imagepng($this->image);
}
}public function getWidth()
{
return imagesx($this->nativeimg);
}public function getHeight()
{
return imagesy($this->nativeimg);
}public function resizeToHeight($height)
{
$ratio = $height / $this->getHeight();
$width = $this->getWidth() * $ratio;
$this->resize($width,$height);
}public function resizeToWidth($width)
{
$ratio = $width / $this->getWidth();
$height = $this->getheight() * $ratio;
$this->resize($width,$height);
}public function resampleToHeight($height)
{
$ratio = $height / $this->getHeight();
$width = $this->getWidth() * $ratio;
$this->resample($width,$height);
}public function resampleToWidth($width)
{
$ratio = $width / $this->getWidth();
$height = $this->getheight() * $ratio;
$this->resample($width,$height);
}
public function scale($scale)
{
$width = $this->getWidth() * $scale/100;
$height = $this->getheight() * $scale/100;
$this->resize($width,$height);
}public function resize($width,$height)
{
$new_image = imagecreatetruecolor($width, $height);
imagecopyresized($new_image, $this->nativeimg, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->image = $new_image;
}public function resample($width,$height)
{
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($new_image, $this->nativeimg, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->image = $new_image;
}public function sharpen($strenght = 18)
{
/*Less value in the middle means more sharpen*/
$sharpen_matrix=array( array(0, -1, 0),
array(-1, $strenght, -1),
array(0, -1, 0));$divisor=array_sum(array_map('array_sum', $sharpen_matrix));
imageconvolution($this->image, $sharpen_matrix, $divisor, 0);
}public function exifrotate($path)
{
if(function_exists('exif_read_data'))
{
$exif = exif_read_data($path);
if(!empty($exif['Orientation']))
{
switch($exif['Orientation'])
{
case 8:
$this->nativeimg = imagerotate($this->nativeimg, 90, 0);
break;
case 3:
$this->nativeimg = imagerotate($this->nativeimg, 180, 0);
break;
case 6:
$this->nativeimg = imagerotate($this->nativeimg, -90, 0);
break;
}
}
}
}
}
Этот класс можно подключить и использовать. Например, вот так.
$image = new SimpleImage();
$image->load($_GET['src']);if(!$_GET['h'] || !$_GET['w']) {
$image->resample(200, 200);
}else{
$image->resample($_GET['w'], $_GET['h']);}header('Content-Type: image/jpeg'); //Обязательно отправляем перед выводом заголовок
$image->output();