is_scalar
(PHP 4 >= 4.0.5, PHP 5)
is_scalar — Finds whether a variable is a scalar
Описание
Finds whether the given variable is a scalar.
Scalar variables are those containing an integer, float, string or boolean. Types array, object and resource are not scalar.
Замечание: 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.
Список параметров
- var
-
The variable being evaluated.
Возвращаемые значения
Returns TRUE if var is a scalar FALSE otherwise.
Примеры
Пример #1 is_scalar() example
<?php
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);
show_var($proteins)
?>
Результат выполнения данного примера:
3.1416 array(3) { [0]=> string(10) "hemoglobin" [1]=> string(20) "cytochrome c oxidase" [2]=> string(10) "ferredoxin" }
Смотрите также
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