sminnee / silverstripe-framework

		$generateMethods = array();

		$methodNames = Image::create()->allMethodNames($custom);

		foreach ($methodNames as $methodName) {

			if (substr($methodName, 0, 8) == 'generate' && $methodName != 'generateformattedimage') {

				$format = substr($methodName, 8);

				$generateMethods[] = $format;

			}

		}

		return $generateMethods;

	}

	private function getFilenamePatterns($filename) {

		$methodNames = $this->allMethodNames(true);

		$generateFuncs = array();

		foreach($methodNames as $methodName) {

			if(substr($methodName, 0, 8) == 'generate') {

				$format = substr($methodName, 8);

				$generateFuncs[] = preg_quote($format);

			}

		}

		// All generate functions may appear any number of times in the image cache name.

		$generateFuncs = implode('|', $generateFuncs);

		$base64url_match = "[a-zA-Z0-9_~]*={0,2}";