My PHP script to automatically create cropped square thumbnails (like flickr does).

Making Square Thumbnails With ImageMagick

The command I use for 100 pixel square thumbnails is (all on one line):

convert input.jpg -thumbnail x200 -resize '200x<' -resize 50% -gravity center -crop 100x100+0+0 +repage -format jpg -quality 91 square.jpg

Below is a PHP script to generate square thumbnails from all images in a directory.

#!/usr/local/php5/bin/php
<?php

    $SQUARESIZE = 108;  // the size in pixels for your square images
    $convertPath = "/usr/local/bin/convert";   // full path to ImageMagick's convert tool

    $path = getcwd()."/";  // path to folder full of jpg files to convert

    $n = 0;

    if ($handle = opendir($path)) {
        while (false !== ($file = readdir($handle))) {
            if ($file != "." && $file != ".." && strpos($file,"jpg") !== false) {
                echo $file."\n";
                $originalname = $file;

                $filenamePart = $n++;

                $squarename = $filenamePart."_sq.jpg";
                $squareCommand = $convertPath." \"".$path.$originalname."\" -thumbnail x".($SQUARESIZE*2)." -resize '".($SQUARESIZE*2)."x<' -resize 50% -gravity center -crop ".$SQUARESIZE."x".$SQUARESIZE."+0+0 +repage -format jpg -quality 91 \"".$path."sq/".$squarename."\"";
                system($squareCommand);
            }
        }
        closedir($handle);
    }

?>

Making Square Thumbnails With ImageMagick

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