StringUtility.php

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<?php
namespace TYPO3\CMS\Core\Utility;

class StringUtility {

    static public function isLastPartOfString($haystack, $needle) {
            // Sanitize $haystack and $needle
        if (is_object($haystack) || (string)$haystack != $haystack || strlen($haystack) < 1) {
            throw new \InvalidArgumentException(
                '$haystack can not be interpreted as string or has no length',
                1347135544
            );
        }
        if (is_object($needle) || (string)$needle != $needle || strlen($needle) < 1) {
            throw new \InvalidArgumentException(
                '$needle can not be interpreted as string or has no length',
                1347135545
            );
        }
        $stringLength = strlen($haystack);
        $needleLength = strlen($needle);
        return strrpos((string) $haystack, (string) $needle, 0) === $stringLength - $needleLength;
    }

}