在1和1主机上使用imagemagick在php中调整图像大小

Question

I am running out of memory when allowing users to resize images of modern day 12MP or higher cameras. Even some pictures that are only 900kb in size take up a lot more room in memory because it's based on pixel size (i think) so ...

I have SSH access to a 1&1 shared server and I followed their instructions to upload imagemagick and configure/make/install it into a directory on my server. Now what do I have to do in php to do the same thing as

$originalImage = imagecreatefromjpeg($src);
$finalImage = imagecreatetruecolor($newWidth,$newHeight);
imagecopyresampled($finalImage, $originalImage, 0, 0, 0, 0, $newWidth, $newHeight, $originalWidth, $originalHeight);
imagejpeg($finalImage,$saveDest,$jpeg_quality);

the variables are hopefully self explanitory. I was trying to find my way through installing the imagick extension but i got really lost when i read about PECL and PEAR and I really don't want to screw up the working php installation somehow.

Answer 1

exec('/path/to/your/home/imagemagick/installation/bin/convert '.$src.' -resize '.$newWidth.'x'.$newHeight.' '.$saveDest);

But make sure you have all variables coming from user site escaped. And $saveDest is writable by your webserver.

Changes are high that you run in to the same memory limit problems, couse apache/php is invoking a script which limits its memory usage to its parent.