ob_get_contents

<?php         ob_start();

        imagejpeg($this->image->getCore(), null, $this->quality);

        $this->image->mime = image_type_to_mime_type(IMAGETYPE_JPEG);

        $buffer = ob_get_contents();

        ob_end_clean();



        return $buffer;

<?php         imagesavealpha($resource, true);

        imagepng($resource, null, -1);

        $this->image->mime = image_type_to_mime_type(IMAGETYPE_PNG);

        $buffer = ob_get_contents();

        ob_end_clean();



        return $buffer;

<?php         ob_start();

        imagegif($this->image->getCore());

        $this->image->mime = image_type_to_mime_type(IMAGETYPE_GIF);

        $buffer = ob_get_contents();

        ob_end_clean();



        return $buffer;

<?php         imagesavealpha($this->image->getCore(), true);

        imagewebp($this->image->getCore(), null, $this->quality);

        $this->image->mime = defined('IMAGETYPE_WEBP') ? image_type_to_mime_type(IMAGETYPE_WEBP) : 'image/webp';

        $buffer = ob_get_contents();

        ob_end_clean();

        

        return $buffer;

<?php         ob_start();

        imagebmp($this->image->getCore());

        $this->image->mime = defined('IMAGETYPE_BMP') ? image_type_to_mime_type(IMAGETYPE_BMP) : 'image/bmp';

        $buffer = ob_get_contents();

        ob_end_clean();

        

        return $buffer;