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is_bool — Finds out whether a variable is a boolean is_int — Find whether the type of a variable is integer is_integer — Alias of is_int() is_long — Alias of is_int() is_float — Finds whether the type of a variable is float is_double — Alias of is_float() is_real — Alias of is_float() is_string — Find whether the type of a variable is string is_array — Finds whether a variable is an array is_object — Finds whether a variable is an object is_resource — Finds whether a variable is a resource is_null — Finds whether a variable is NULL is_numeric — Finds whether a variable is a number or a numeric string is_scalar — Finds whether a variable is a scalar is_callable — Verify that the contents of a variable can be called as a function intval — Get the integer value of a variable floatval — Get float value of a variable doubleval — Alias of floatval() strval — Get string value of a variable empty — Determine whether a variable is empty isset — Determine if a variable is set and is not NULL unset — Unset a given variable print_r — Prints human-readable information about a variable var_dump — Dumps information about a variable var_export — Outputs or returns a parsable string representation of a variable gettype — Get the type of a variable settype — Set the type of a variable |
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