is_scalar() returns TRUE if the variable given by the var parameter is a scalar,
otherwise it returns
FALSE.
Scalar variables are those containing an
integer, float, string
or
boolean. Types array, object
and
resource or not scalar.
function show_var($var) { if (is_scalar($var)) { echo $var; } else { var_dump($var); } } $pi = 3.1416; $proteins = array("hemoglobin", "cytochrome c oxidase", "ferredoxin"); show_var($pi); // prints: 3.1416 show_var($proteins) // prints: // array(3) { // [0]= // string(10) "hemoglobin" // [1]= // string(20) "cytochrome c oxidase" // [2]= // string(10) "ferredoxin" // } |
注: is_scalar() does not consider resource type values to be scalar as resources are abstract datatypes which are currently based on integers. This implementation detail should not be relied upon, as it may change.
See also is_bool(),
is_numeric(), is_float(), is_int(),
is_real(), is_string(),
is_object(), is_array(), and
is_integer().