[TYPO3-install] TYPO3 Fatal Error - Call to undefined function

[Tom Warwick]

Hello,

Im having an issue with both 6.2.15 and 7.2 on the same server. When ever I try to use cal or ext:news I get the following error message:

Fatal error: Call to undefined function TYPO3\CMS\Extbase\Property\TypeConverter\ctype_digit() in /usr/local/www/apache24/data/typo3/sysext/extbase/Classes/Property/TypeConverter/PersistentObjectConverter.php on line 203