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# is_scalar

(PHP 4 >= 4.0.5, PHP 5)

is_scalar -- Finds whether a variable is a scalar

## Beskrivelse

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.

> Bemærk: 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.

## Parameterliste

var

  The variable being evaluated.

## Returneringsværdier

Returns `TRUE` if var is a scalar `FALSE` otherwise.

## Eksempler

Eksempel 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) ?>`

Ovenstående eksempel vil udskrive:

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

## Se også

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

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is_resource | op | is_string