I’m too busy to explain the script now. In short, it scans the current directory for all the JPG images and converts them into smaller image files hardly compromising the quality. I managed to convert a 211 MB album into a 5.8 MB collection with this script. Modify the $dir varible which holds the location of target directory. Make sure the target directory already exists. Also change the $percent inside the resize function to control the output quality.
Thanks to PHP for such powerful image processing. I just ran the following command on my Ubuntu terminal:
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cd /var/www/photos php img.php |
I was done! Here’s the source code:
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<?php $dir = "/home/masnun/Desktop/photos/"; $files = glob("*.JPG"); echo count($files). " to process \n"; foreach( $files as $file ) { echo "Processing: {$file} ...."; resize($file, $dir); echo " -- done \n"; } function resize($img, $dir) { $new_loc = $dir.basename($img); $percent = 30; $constrain = ""; $w = "" ; $h = ""; // get image size of img $x = @getimagesize($img); // image width $sw = $x[0]; // image height $sh = $x[1]; if ($percent > 0) { // calculate resized height and width if percent is defined $percent = $percent * 0.01; $w = $sw * $percent; $h = $sh * $percent; } else { if (isset ($w) AND !isset ($h)) { // autocompute height if only width is set $h = (100 / ($sw / $w)) * .01; $h = @round ($sh * $h); } elseif (isset ($h) AND !isset ($w)) { // autocompute width if only height is set $w = (100 / ($sh / $h)) * .01; $w = @round ($sw * $w); } elseif (isset ($h) AND isset ($w) AND isset ($constrain)) { // get the smaller resulting image dimension if both height // and width are set and $constrain is also set $hx = (100 / ($sw / $w)) * .01; $hx = @round ($sh * $hx); $wx = (100 / ($sh / $h)) * .01; $wx = @round ($sw * $wx); if ($hx < $h) { $h = (100 / ($sw / $w)) * .01; $h = @round ($sh * $h); } else { $w = (100 / ($sh / $h)) * .01; $w = @round ($sw * $w); } } } $im = @ImageCreateFromJPEG ($img) or // Read JPEG Image $im = @ImageCreateFromPNG ($img) or // or PNG Image $im = @ImageCreateFromGIF ($img) or // or GIF Image $im = false; // If image is not JPEG, PNG, or GIF if (!$im) { // We get errors from PHP's ImageCreate functions... // So let's echo back the contents of the actual image. readfile ($img); } else { // Create the resized image destination $thumb = @ImageCreateTrueColor ($w, $h); // Copy from image source, resize it, and paste to image destination @ImageCopyResampled ($thumb, $im, 0, 0, 0, 0, $w, $h, $sw, $sh); // Output resized image @ImageJPEG ($thumb, $new_loc); } } ?> |
2 replies on “Power of PHP: Resizing Images on Command Line”
Hi,
Its very interesting peace of code I had created modules for my project with the help of your above guidance and its help more thank you again for sharing
Thanks
Interesting Information, Love to know about PHP powerful image processing. That I thing is the reason PHP is a popular language.