(PHP 4 >= 4.0.5, PHP 5, PHP 7, PHP 8)
is_scalar — Finds whether a variable is a scalar
Finds whether an expression is evaluated as a scalar value.
See scalar types for more information.
Зауваження:
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.
Зауваження:
is_scalar() does not consider NULL to be scalar.
value
The variable being evaluated.
Приклад #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)
?>
Поданий вище приклад виведе:
3.1416 array(3) { [0]=> string(10) "hemoglobin" [1]=> string(20) "cytochrome c oxidase" [2]=> string(10) "ferredoxin" }