我们正在将 PDF 页面转换为多个单个图像。我们在stackoverflow中找到了一段代码片段,并将其转换为服务类。我们安装了 Imagick,它也显示在 phpinfo() 中。然而,在我们的 Laravel 应用程序版本 5.2 中,我们收到以下错误。
ReflectionException in Container.php line 798:
Class Imagick does not exist
我们在 Laravel 环境之外测试了我们的代码,它运行得非常好。不会引发此类错误。我们还运行以下命令来检查 Imagick
php -i | grep -i imagick
这是输出
/etc/php5/cli/conf.d/20-imagick.ini,
imagick
imagick module => enabled
imagick module version => 3.4.3RC1
imagick classes => Imagick, ImagickDraw, ImagickPixel, ImagickPixelIterator
Imagick compiled with ImageMagick version => ImageMagick 6.7.7-10 2016-06-01 Q16 http://www.imagemagick.org
Imagick using ImageMagick library version => ImageMagick 6.7.7-10 2016-06-01 Q16 http://www.imagemagick.org
imagick.locale_fix => 0 => 0
imagick.progress_monitor => 0 => 0
imagick.skip_version_check => 0 => 0
一切似乎都是对的。它可以在 Laravel 之外运行,但不能在 Laravel 中运行。我不知道出了什么问题。我们必须配置 Laravel 才能使用 Imagick 吗?
这是我们正在使用的服务类
<?php
namespace App\Services\Utilities;
use Imagick;
class PdfToImageService
{
/**
* Destination folder where images will be saved
* @var string
*/
protected $destination = 'images/users/';
/**
* Injecting dependencies
*
* @param Imagick $imagick
*/
function __construct(Imagic $imagick)
{
$this->imagick = $imagick;
}
/**
* Convert pdf having multiple pages to multiple single images
*
* 1. Strip document extension
* 2. Convert this document
* 3. Set background color and flatten. It Prevents black background on objects with transparency
* 4. Set image resolution
* 5. Determine number of pages
* 6. Compress Image Quality
* 7. Generate images from each pdf page
* 8. Destroy current imagick session
*
* @param string $fileName
* @return array $convertedImageNames
*/
public function createImages($fileName)
{
$fileName = basename($fileName);
$this->imagick->readImage($fileName);
$this->imagick->setImageBackgroundColor('white');
$this->imagick->setResolution(300,300);
$this->imagick->setImageCompressionQuality(100);
$convertedImageNames = $this->generateImageFromPDFPage(
$fileName, $this->imagick->getNumberImages()
);
$this->imagick->destroy();
return $convertedImageNames;
}
/**
* Loop throught each pdf pages and convert it to image.
* A. Set iterator postion
* B. Set image format
* C. Write Images to destination folder
*
* @param string $fileName
* @param integer $noOfPages
* @return array
*/
private function generateImageFromPDFPage($fileName, $noOfPages)
{
for($i = 0;$i < $noOfPages; $i++) {
$this->imagick->setIteratorIndex($i);
$this->imagick->setImageFormat('jpeg');
$this->imagick->writeImage($this->destination.$fileName.'-'.$i.'.jpg');
$convertedImageNames[$i] = $fileName.'-'.$i.'.jpg';
}
return $convertedImageNames;
}
}