nwtn\Respimg::optimize PHP Method

    public static function optimize($path, $svgo = 0, $image_optim = 0, $picopt = 0, $imageOptim = 0)
    {
        // make sure the path is real
        if (!file_exists($path)) {
            return false;
        }
        $is_dir = is_dir($path);
        if (!$is_dir) {
            $dir = escapeshellarg(substr($path, 0, strrpos($path, '/')));
            $file = escapeshellarg(substr($path, strrpos($path, '/') + 1));
        }
        $path = escapeshellarg($path);
        // make sure we got some ints up in here
        $svgo = (int) $svgo;
        $image_optim = (int) $image_optim;
        $picopt = (int) $picopt;
        $imageOptim = (int) $imageOptim;
        // create some vars to store output
        $output = array();
        $return_var = 0;
        // if we’re using image_optim, we need to create the YAML config file
        if ($image_optim > 0) {
            $yml = tempnam('/tmp', 'yml');
            file_put_contents($yml, "verbose: true\njpegtran:\n  progressive: false\noptipng:\n  level: 7\n  interlace: false\npngcrush:\n  fix: true\n  brute: true\npngquant:\n  speed: 11\n");
        }
        // do the svgo optimizations
        for ($i = 0; $i < $svgo; $i++) {
            if ($is_dir) {
                $command = escapeshellcmd('svgo -f ' . $path . ' --disable removeUnknownsAndDefaults');
            } else {
                $command = escapeshellcmd('svgo -i ' . $path . ' --disable removeUnknownsAndDefaults');
            }
            exec($command, $output, $return_var);
            if ($return_var != 0) {
                return false;
            }
        }
        // do the image_optim optimizations
        for ($i = 0; $i < $image_optim; $i++) {
            $command = escapeshellcmd('image_optim -r ' . $path . ' --config-paths ' . $yml);
            exec($command, $output, $return_var);
            if ($return_var != 0) {
                return false;
            }
        }
        // do the picopt optimizations
        for ($i = 0; $i < $picopt; $i++) {
            $command = escapeshellcmd('picopt -r ' . $path);
            exec($command, $output, $return_var);
            if ($return_var != 0) {
                return false;
            }
        }
        // do the ImageOptim optimizations
        // ImageOptim can’t handle the path with single quotes, so we have to strip them
        // ImageOptim-CLI has an issue where it only works with a directory, not a single file
        for ($i = 0; $i < $imageOptim; $i++) {
            if ($is_dir) {
                $command = escapeshellcmd('imageoptim -d ' . $path . ' -q');
            } else {
                $command = escapeshellcmd('find ' . $dir . ' -name ' . $file) . ' | imageoptim';
            }
            exec($command, $output, $return_var);
            if ($return_var != 0) {
                return false;
            }
        }
        return $output;
    }

 private function optimize($imagePath)
 {
     chmod($imagePath, 0777);
     $image = new Respimg($imagePath);
     $width = getimagesize($imagePath);
     if ($width > 54) {
         $width = 54;
     }
     $image->smartResize($width, 0, true);
     $image->cropImage($width, $width, 0, 0);
     $image->writeImage($imagePath);
     Respimg::optimize($imagePath, 0, 1, 1, 1);
 }