Variables handling
PHP Manual

is_scalar

(PHP 4 >= 4.0.5, PHP 5)

is_scalar — Finds whether a variable is a scalar

Описание

bool is_scalar ( mixed $var )

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.

Note: 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

Example#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


Variables handling
PHP Manual