Variable handling Functions

Table of Contents

• boolval — Get the boolean value of a variable
• debug_zval_dump — Dumps a string representation of an internal zval structure to output
• doubleval — Alias of floatval
• empty — Determine whether a variable is empty
• floatval — Get float value of a variable
• get_debug_type — Gets the type name of a variable in a way that is suitable for debugging
• get_defined_vars — Returns an array of all defined variables
• get_resource_id — Returns an integer identifier for the given resource
• get_resource_type — Returns the resource type
• gettype — Get the type of a variable
• intval — Get the 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 a value can be called as a function from the current scope
• is_countable — Verify that the contents of a variable is a countable value
• is_double — Alias of is_float
• is_float — Finds whether the type of a variable is float
• is_int — Find whether the type of a variable is integer
• is_integer — Alias of is_int
• is_iterable — Verify that the contents of a variable is an iterable value
• 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 — Find whether the type of a variable is string
• isset — Determine if a variable is declared and is different than null
• 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