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LXXX. Variable Functions

Table of Contents
doubleval — Get double value of a variable
empty — Determine whether a variable is set
gettype — Get the type of a variable
get_defined_vars — Returns an array of all defined variables
get_resource_type — Returns the resource type
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 — Finds whether a variable is a double
is_float — Finds whether a variable is a float
is_int — Find whether a variable is an integer
is_integer — Find whether a variable is an integer
is_long — Finds whether a variable is an integer
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 — Finds whether a variable is a real
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

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