Whitelisting is no longer available to enable access to PHP 5.4. Applications must now use PHP 5.5. However, if you are experiencing issues with PHP 5.5, you can find help on the Google App Engine Stack Overflow Tag. Alternatively, if you have a paid support package, you can open a support case. If you have found an issue with App Engine itself you may also file a bug on our public issue tracker.
PHP Whitelisting Request
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