note 60111 added to function.strspn

USEFUL TO FIND FORBIDDEN CHARACTERS IN A STRING, according to a pattern!, in conjunction with string length. finds the position of the first of any characters on the pattern, against string lenght. useful to catch illegal characters in a string, e.g. in names, forms, filenames, emails, numbers, urls, etc.. examples: <?php //example one: natural numbers $allowed="0123456789"; if (strlen($number) != strspn($number,$allowed)) { echo "i said only numbers!"; } //example two: email (with some characters) $allowed="qwertyasdf123@._"; if (strlen($email) != strspn($email,$allowed)) { echo "invalid email!"; } // examle three: filenames or urls (with some characters) $allowed="asdfASDF123/-_~."; if (strlen($path) != strspn($path,$allowed)) { echo "invalid path!"; } // THANKS ?> another variant, assuming a value diffrent to zero as TRUE: <?php if (strlen($email)-strspn($email,$"qwerty123@._")) { echo "dont try to fool me, invalid email"; } ?> ---- Manual Page -- http://www.php.net/manual/en/function.strspn.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+60111 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+60111&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+60111&report=yes Search -- http://master.php.net/manage/user-notes.php