westminster86 Posted April 3, 2008 Share Posted April 3, 2008 Just a quick question regarding form fields validation. How would i check to see if for instance only letters are entered into a field and fields that should only take digits. Thanks in advance Link to comment https://forums.phpfreaks.com/topic/99355-validation/ Share on other sites More sharing options...
cgm225 Posted April 3, 2008 Share Posted April 3, 2008 Check of the variable is an integer with FILTER_VALIDATE_INT See: http://us3.php.net/manual/en/ref.filter.php#filter.constants for other filters and examples of how to use them. Link to comment https://forums.phpfreaks.com/topic/99355-validation/#findComment-508338 Share on other sites More sharing options...
lordfrikk Posted April 3, 2008 Share Posted April 3, 2008 For mono-type validation (only letters or only digits) use filter functions or ctype_xxxx functions (ctype_alpha etc.). For more complex validation, use regular expressions - PCRE. Link to comment https://forums.phpfreaks.com/topic/99355-validation/#findComment-508364 Share on other sites More sharing options...
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