Fast resize picture tool/script - php

Question

I have a lot of images (500,000 +) in a folder on the server organized by date. I made a PHP script to copy and crop each JPG file on a subfolder (thumb), but it's very slow since PHP doesn't support multithreading.
I want advice on how to proceed. Is Python a good option for this? Is there a good tool, or how can I improve my resize function?
You can also take a look to my PHP Code

Answer 1

You can do it in PHP without any problem, simulating threads instead of using them directly. Actually, PHP doesn't have native threads (you can eventuall¥ use libraries but that's not very useful in your case).
In your code, instead of calling :
static::Crop($file,$destination,$tn_w = 300,$tn_h =200,$quality = 100,$wmsource = false);
Why not doing :
$array = array($file, $destination, $tn_w = 300, $tn_h = 200, $quality = 100, $wmsource = 0);
$command = "/usr/bin/php crop.php";
foreach ($array as $arg)
{
$command .= ' ' . escapeshellarg($arg);
}
exec("$command &"); // note the & which release your execution
usleep(100000);
And you put your cropping function inside crop.php, and then call it like :
list($exec, $file, $destination, $tn_w, $tn_h, $quality, $wmsource) = $argv;
static::Crop($file,$destination,$tn_w = 300,$tn_h =200,$quality = 100,$wmsource = false);
This will do the job.
You can also simulate mutexes using a file if you want to avoid usleep and control how many crops are running at once, that's really up to you. You definitely can do such work in PHP.

Answer 2

But php cgi support multithreading. Why not using exec()? Or you can use a shell script and for the conversion php cgi?

Answer 3

by Use This class
<?php
class thumbnail_images {
// get
var $PathImgOld;
var $PathImgNew;
var $NewWidth;
var $NewHeight;
// tmp
var $mime;
function imagejpeg_new ($NewImg,$path_img) {
if ($this->mime == 'image/jpeg' or $this->mime == 'image/pjpeg') imagejpeg($NewImg,$path_img);
elseif ($this->mime == 'image/gif') imagegif($NewImg, $path_img);
elseif ($this->mime == 'image/png') imagepng($NewImg, $path_img);
else return(false);
return(true);
}
function imagecreatefromjpeg_new($path_img) {
if ($this->mime == 'image/jpeg' or $this->mime == 'image/pjpeg') $OldImg = imagecreatefromjpeg($path_img);
elseif ($this->mime == 'image/gif') $OldImg = imagecreatefromgif($path_img);
elseif ($this->mime == 'image/png') $OldImg = imagecreatefrompng($path_img);
else return(false);
return($OldImg);
}
function create_thumbnail_images() {
$PathImgOld = $this->PathImgOld;
$PathImgNew = $this->PathImgNew;
$NewWidth = $this->NewWidth;
$NewHeight = $this->NewHeight;
$Oldsize = #getimagesize($PathImgOld);
$this->mime = $Oldsize['mime'];
$OldWidth = $Oldsize[0];
$OldHeight = $Oldsize[1];
if ($NewHeight == '' and $NewWidth != '') {
$NewHeight = ceil(($OldHeight * $NewWidth) / $OldWidth);
}
elseif ($NewWidth == '' and $NewHeight != '') {
$NewWidth = ceil(($OldWidth * $NewHeight) / $OldHeight);
}
elseif ($NewHeight == '' and $NewWidth == '') {
return(false);
}
$OldHeight_castr = ceil(($OldWidth * $NewHeight) / $NewWidth);
$castr_bottom = ($OldHeight - $OldHeight_castr) / 2;
$OldWidth_castr = ceil(($OldHeight * $NewWidth) / $NewHeight);
$castr_right = ($OldWidth - $OldWidth_castr) / 2;
if ($castr_bottom>0) {
$OldWidth_castr = $OldWidth;
$castr_right = 0;
}
elseif ($castr_right>0) {
$OldHeight_castr = $OldHeight;
$castr_bottom = 0;
}
else {
$OldWidth_castr = $OldWidth;
$OldHeight_castr = $OldHeight;
$castr_right = 0;
$castr_bottom = 0;
}
$OldImg = $this->imagecreatefromjpeg_new($PathImgOld);
if ($OldImg) {
$NewImg_castr = imagecreatetruecolor($OldWidth_castr, $OldHeight_castr);
if ($NewImg_castr) {
imagecopyresampled($NewImg_castr, $OldImg, 0, 0, $castr_right, $castr_bottom, $OldWidth_castr, $OldHeight_castr, $OldWidth_castr, $OldHeight_castr);
$NewImg = imagecreatetruecolor($NewWidth, $NewHeight);
if ($NewImg) {
imagecopyresampled($NewImg, $NewImg_castr, 0, 0, 0, 0, $NewWidth, $NewHeight, $OldWidth_castr, $OldHeight_castr);
imagedestroy($NewImg_castr);
imagedestroy($OldImg);
if (!$this->imagejpeg_new($NewImg, $PathImgNew)) return (false);
imagedestroy($NewImg);
}
}
}
else {
return(false);
}
return(true);
}
}
?>
Now use it
$width = $_REQUEST['img_width'];
$height = $_REQUEST['img_height'];
// example
$obj_img = new thumbnail_images();
$obj_img->PathImgOld = 'Old_image.jpg'; // Image for resize
$obj_img->PathImgNew = 'my_image_new_formSubURLkki.jpg'; // New Image Path
$obj_img->NewWidth = $width;
$obj_img->NewHeight = $height;
if (!$obj_img->create_thumbnail_images()) echo "error";
else {
echo 'Image Maked andsave in directory';
}