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# LIII. 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.
intval — Get integer value of a variable.
is_array — Finds whether a variable is an array.
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_object — Finds whether a variable is an object.
is_real — Finds whether a variable is a real.
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.

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