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POreducing php memory usage for image resizing
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Id
4619323
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4619441
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2011-01-06T20:07:53.373
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text
Body
I'm currently creating a PHP website where users need to be able to upload images, which then need to resized down to a reasonable size. My php configuration is set to a memory limit of 50mb. The problem is when uploading images over around 5mb, php is not able to resize the image(due to to much memory use). So I was wondering if there's anyway to optimize memory usage of a resizing images. Here's what I currently use: <pre><code>class Image { var $uploaddir; var $quality = 80; var $ext; var $dst_r; var $img_r; var $img_w; var $img_h; var $output; var $data; var $datathumb; function setFile($src = null) { $this->ext = strtoupper(pathinfo($src, PATHINFO_EXTENSION)); if(is_file($src) && ($this->ext == "JPG" OR $this->ext == "JPEG")) { $this->img_r = ImageCreateFromJPEG($src); } elseif(is_file($src) && $this->ext == "PNG") { $this->img_r = ImageCreateFromPNG($src); } elseif(is_file($src) && $this->ext == "GIF") { $this->img_r = ImageCreateFromGIF($src); } $this->img_w = imagesx($this->img_r); $this->img_h = imagesy($this->img_r); } function resize($largestSide = 100) { $width = imagesx($this->img_r); $height = imagesy($this->img_r); $newWidth = 0; $newHeight = 0; if($width > $height){ $newWidth = $largestSide; $newHeight = $height * ($newWidth / $width); }else{ $newHeight = $largestSide; $newWidth = $width * ($newHeight / $height); } $this->dst_r = ImageCreateTrueColor($newWidth, $newHeight); imagecopyresampled($this->dst_r, $this->img_r, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height); $this->img_r = $this->dst_r; $this->img_h = $newHeight; $this->img_w = $newWidth; } function createFile($output_filename = null) { if($this->ext == "JPG" OR $this->ext == "JPEG" OR $this->ext == "PNG" OR $this->ext == "GIF") { imageJPEG($this->dst_r, $this->uploaddir.$output_filename.'.'."jpg", $this->quality); } /*elseif($this->ext == "PNG") { imagePNG($this->dst_r, $this->uploaddir.$output_filename.'.'.$this->ext); } elseif($this->ext == "GIF") { imageGIF($this->dst_r, $this->uploaddir.$output_filename.'.'.$this->ext); }*/ $this->output = $this->uploaddir.$output_filename.'.'.$this->ext; } function setUploadDir($dirname) { $this->uploaddir = $dirname; } function flush() { $tempFile = $_FILES['Filedata']['tmp_name']; $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/'; $targetFile = str_replace('//','/',$targetPath) . $_FILES['Filedata']['name']; imagedestroy($this->dst_r); unlink($targetFile); imagedestroy($this->img_r); } </code></pre> And then for resizing I do: <pre><code> $tempFile = $_FILES['Filedata']['tmp_name']; $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/'; $targetFile = str_replace('//','/',$targetPath) . $_FILES['Filedata']['name']; move_uploaded_file ($tempFile, $targetFile); $image = new Image(); $image->setFile($targetFile); $image->setUploadDir($targetPath); $image->resize(200); $image->createFile(md5($id)); $image->flush(); </code></pre> I'm current using uploadify, but it uses this upload / resize script. Is there anyway to optimize this code so that it uses less memory? Thanks :)
Tags
<php><image><memory><memory-management><resize>
Title
reducing php memory usage for image resizing
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