(PECL phar:1.2.0-1.2.1)
Phar::isValidPharFilename — Returns whether the given filename is a valid phar filename
Returns whether the given filename is a valid phar filename that will be recognized as a phar archive by the phar extension. This can be used to test a name without having to instantiate a phar archive and catch the inevitable Exception that will be thrown if an invalid name is specified.
Returns TRUE if the filename is valid.