PHP ʖ²ἯTH º󍋼/A CIII. Variable Functions ½鉜 For information on how variables behave, see the Variables entry in the Language Reference section of the manual. Шdz ΞШ͢²¿¿⎄¼þ¾ͿɒԼӈ뱾)չģ¿鵄֧³֡£ °²װ բЩº¯ʽ׷Ϊ PHP ºːĵĒ»²¿·֣¬ΞШ±»°²װ¼´¿Ɋ¹Ӄ¡£ ԋАʱŤփ բЩº¯ʽµĐЎªʜµ½ȫ¾ּA HREF="configuration.html#configuration.file" Ťփ΄¼þ php.ini µē°Ϭ¡£ Name Default Changeable unserialize_callback_func "" PHP_INI_ALL The unserialize callback function will called (with the undefind class' name as parameter), if the unserializer finds an undefined class which should be instanciated. A warning appears if the specified function is not defined, or if the function doesn't include/implement the missing class. So only set this entry, if you really want to implement such a callback-function. See also unserialize(). ׊Դ Ѝ ¸À©չģ¿鎴¶¨ҥȎºΗʔ´ Ѝ¡£ Ԥ¶¨ҥ³£ Ŀ¼ doubleval -- Alias of floatval() empty -- Determine whether a variable is set floatval -- Get float value of a variable get_defined_vars -- Returns an array of all defined variables get_resource_type -- Returns the resource type gettype -- Get the type of a variable import_request_variables -- Import GET/POST/Cookie variables into the global scope intval -- Get integer value of a variable is_array -- Finds whether a variable is an array is_bool -- Finds out whether a variable is a boolean is_callable -- Find out whether the argument is a valid callable construct is_double -- Alias of is_float() is_float -- Finds whether a variable is a float is_int -- Find whether a variable is an integer is_integer -- Alias of is_int() is_long -- Alias of is_int() is_null -- Finds whether a variable is NULL is_numeric -- Finds whether a variable is a number or a numeric string is_object -- Finds whether a variable is an object is_real -- Alias of is_float() is_resource -- Finds whether a variable is a resource is_scalar -- Finds whether a variable is a scalar is_string -- Finds whether a variable is a string isset -- Determine whether a variable is set print_r -- Prints human-readable information about a variable serialize -- Generates a storable representation of a value settype -- Set the type of a variable strval -- Get string value of a variable unserialize -- Creates a PHP value from a stored representation unset -- Unset a given variable var_dump -- Dumps information about a variable var_export -- Outputs or returns a string representation of a variable º󍋼/A ưµ㼯A urlencode ɏһ¼¶ doubleval