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<?php namespace Intervention\Image\Commands; class ChecksumCommand extends AbstractCommand { /** * Calculates checksum of given image * * @param \Intervention\Image\Image $image * @return boolean */ public function execute($image) { $colors = []; $size = $image->getSize(); for ($x=0; $x <= ($size->width-1); $x++) { for ($y=0; $y <= ($size->height-1); $y++) { $colors[] = $image->pickColor($x, $y, 'array'); } } $this->setOutput(md5(serialize($colors))); return true; } }