When memory limit is reached, disk space is used for memory. Memory usage can be limited by using : $img->setResourceLimit( Imagick::RESOURCETYPE_MEMORY, 5 ) This should work where gd fails due to memory limitations. Resize using imagemagick, it is memory efficient, GD fails since images are uncompressed.Įcho 'Caught exception: ', $e->getMessage(), "n"
#Resize php how to#
Here is a quick example of how to resize an image using imagemagick library. Imagemagick can resize large images by using disk space instead of RAM memory. My developer enabled php fileinfo but I still am getting the message at the top of my dashboard that says :Smart Image Resize: PHP Fileinfo extension is not enabled, contact your hosting provider to enable it. To overcome the memory problem, imagemagick is an excellent solution. The amount of memory needed in uncompressed form can easily go upto several hundreds of MBs which is much higher than what php normally has access to on a typical web server depending on the configuration.Īnd then memory exceeded error might be thrown depending on how much memory is available to php.
This memory is taken from RAM or the memory allocated to php. If a jpg image for example, is 5000px x 5000px then imagecreatefromjpg would uncompress it and use a large amount of memory (5000 x 5000 pixels) to store it. The above program can resize a gif, jpg, or png image and the output is a jpg image. If(! imagecopyresampled($imageResized, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height)) If(!($imageResized = imagecreatetruecolor($new_width, $new_height)))ĭie("Could not create new image resource of width : $new_width, height : $new_height") $new_height = round($height * (1/$xscale)) $new_width = round($width * (1/$xscale)) $new_height = round($height * (1/$yscale)) $new_width = round($width * (1/$yscale)) List( $width, $height ) = getimagesize( $src ) $img = imagecreatefrompng ($src) //try pngĭie("Could Not create image resource $src")
$img = imagecreatefromgif ($src) //try gif $img = imagecreatefromjpeg ($src) //try jpg Here is a quick example function resize_image($src, $dest, $toWidth, $toHeight, $options = array()) The function imagecopyresampled is used to resize an image with gd library. On the other hand Imagemagick uses disk space to process the image data and can work with large size images easily. GD vs Imagemagick: GD library uses ram memory to decode and encode images which becomes an issue when the image size is large and php runs out of available memory. The default library to handle image operations in php is GD.
0 kommentar(er)
