XCVIII. Variable Functions

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

Table of Contents

doubleval -- Alias of floatval()

empty -- Determine whether a variable is set

floatval -- Get float value of a variable

gettype -- Get the type of a variable

get_defined_vars -- Returns an array of all defined variables

get_resource_type -- Returns the resource type

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_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 avariable

is_callable -- Find out whether the argument is a valid callable construct