LXIII. Variable Functions

Table of Contents
call_user_func — Call a user function given by the first parameter
doubleval — Get double value of a variable
empty — Determine whether a variable is set
gettype — Get the type of a variable
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_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_string — Finds whether a variable is a string
isset — Determine whether a variable is set
print_r — Prints human-readable information about a variable
settype — Set the type of a variable
strval — Get string value of a variable
unset — Unset a given variable
var_dump — Dumps information about a variable