is_scalarPodręcznik PHPPoprzedniNastępnyis_scalar (PHP 4 >= 4.0.5)is_scalar --
Finds whether a variable is a scalar
Descriptionbool is_scalar ( mixed var)
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"
// }
Notatka:
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().
PoprzedniSpis treściNastępnyis_resourcePoczątek rozdziałuis_string
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