(PHP 4 >= 4.0.5, PHP 5)
is_scalar — Finds whether a variable is a scalar
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.
Informacja:
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.
Informacja:
is_scalar() does not consider NULL to be scalar.
var
The variable being evaluated.
Returns TRUE if var is a scalar FALSE
otherwise.
Przykład #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)
?>
Powyższy przykład wyświetli:
3.1416
array(3) {
[0]=>
string(10) "hemoglobin"
[1]=>
string(20) "cytochrome c oxidase"
[2]=>
string(10) "ferredoxin"
}