PHP ʖ²ἯTH º󍋼/A XVI. Character type functions ½鉜 The functions provided by this extension check whether a character or string falls into a certain character class according to the current locale (see also setlocale()). When called with an integer argument these functions behave exactly like their C counterparts from ctype.h. When called with a string argument they will check every character in the string and will only return TRUE if every character in the string matches the requested criteria. When called with an empty string the result will always be TRUE. Passing anything else but a string or integer will return FALSE immediately. Шdz None besides functions from the standard C library which are always available. °²װ Beginning with PHP 4.2.0 these functions are enabled by default. For older versions you have to configure and compile PHP with --enable-ctype. You can disable ctype support with --disable-ctype. PHP µĠWindows °汾ґ¾­Ěփ¸À©չģ¿鵄֧³֡£ĺΞШ¼Ӕ؈κθ½¼ӵĀ©չ¿⼴¿Ɋ¹ӃբЩº¯ʽ¡£ ע: Builtin support for ctype is available with PHP 4.3.0. ԋАʱŤփ ¸À©չģ¿鎴¶¨ҥȎºΉ薃ָn¡£ ׊Դ Ѝ ¸À©չģ¿鎴¶¨ҥȎºΗʔ´ Ѝ¡£ Ԥ¶¨ҥ³£ ¸À©չģ¿鎴¶¨ҥȎºγ£¡£ Ŀ¼ ctype_alnum -- Check for alphanumeric character(s) ctype_alpha -- Check for alphabetic character(s) ctype_cntrl -- Check for control character(s) ctype_digit -- Check for numeric character(s) ctype_graph -- Check for any printable character(s) except space ctype_lower -- Check for lowercase character(s) ctype_print -- Check for printable character(s) ctype_punct -- Check for any printable character which is not whitespace or an alphanumeric character ctype_space -- Check for whitespace character(s) ctype_upper -- Check for uppercase character(s) ctype_xdigit -- Check for character(s) representing a hexadecimal digit º󍋼/A ưµ㼯A cyrus_unbind ɏһ¼¶ ctype_alnum