CXXIX. Variable Handling Functions

Úvod

For information on how variables behave, see the Variables entry in the Language Reference section of the manual.

Požiadavky

�iadne extern� kni�nice nie s� potrebn� na vybudovanie tohto roz��renia.

Inštalácia

Nie je potrebn� �iadna in�tal�cia na pou�itie t�chto funkci�; s� �as�ou jadra PHP.

Runtime Konfigurácia

Spr�vanie tejto funkcie je ovplyvnen� nastaveniami v php.ini.

Tabuľka 1. Variables Configuration Options

NameDefaultChangeableChangelog
unserialize_callback_funcNULLPHP_INI_ALLAvailable since PHP 4.2.0.
Pre �al�ie detaily a defin�cie PHP_INI_* kon�t�nt, si pozrite ini_set() dokument�ciu.

Tu je kr�tke vysvetlenie konfigura�n�ch direkt�v.

unserialize_callback_func string

The unserialize() callback function will called (with the undefined 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().

Typy zdrojov

Toto roz��renie nem� definovan� �iadne typy zdrojov.

Preddefinované Konštanty

Toto roz��renie nem� definovan� �iadne kon�tanty.

Obsah
debug_zval_dump -- Dumps a string representation of an internal zend value to output
doubleval -- Alias of floatval()
empty -- Determine whether a variable is empty
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 --  Verify that the contents of a variable can be called as a function
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 parsable string representation of a variable