PHP is_scalar function

Like this blog? Consider exploring one of our sponsored banner ads...

is_scalar

(PHP 4 >= 4.0.5, PHP 5)

is_scalar —
Finds whether a variable is a scalar
Descriptionbool 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.

Parameters

var

The variable being evaluated.


Return Values

Returns TRUE if var is a scalar FALSE
otherwise.

Examples

Example 1. is_scalar() example

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)

The above example will output:

3.1416
array(3) {
[0]=>
string(10) “hemoglobin”
[1]=>
string(20) “cytochrome c oxidase”
[2]=>
string(10) “ferredoxin”
}

See Also

is_float()is_int()is_numeric()is_real()is_string()is_bool()is_object()is_array()


About this entry

You’re currently reading “PHP is_scalar function,” an entry on BRADINO

Published:
2.26.07 / 12am
Category:
PHP Functions
Tags: