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(PHP 4 >= 4.0.5, PHP 5)

is_scalar --  Finds whether a variable is a scalar

Description

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.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is a scalar FALSE otherwise.

Examples

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)

?>

The above example will output:

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

Related Function(s)

is_float()

is_int()

is_numeric()

is_real()

is_string()

is_bool()

is_object()

is_array()