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.
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)
?>
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Результат выполнения данного примера: 3.1416
array(3) {
[0]=>
string(10) "hemoglobin"
[1]=>
string(20) "cytochrome c oxidase"
[2]=>
string(10) "ferredoxin"
} |
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