/website/source/php/var/is_null.html

---
warning: 'This file is auto generated by `npm run web:inject`, do not edit by hand'
examples:
  - is_null('23')
  - is_null(null)
estarget: es5
returns:
  - 'false'
  - 'true'
dependencies: []
authors:
  original by:
    - 'Kevin van Zonneveld (http://kvz.io)'
notes: []
type: function
layout: function
title: PHP's is_null in JavaScript
description: >-
  Here’s what our current JavaScript equivalent to <a
  href="http://php.net/manual/en/function.is_null.php">PHP's is_null</a> looks
  like.
function: is_null
category: var
language: php
permalink: php/var/is_null/
alias:
  - /functions/php/is_null/
  - /functions/var/is_null/
  - /php/is_null/
  - /functions/is_null/
---
{% codeblock lang:javascript %}module.exports = function is_null (mixedVar) { // eslint-disable-line camelcase
  //  discuss at: http://locutus.io/php/is_null/
  // original by: Kevin van Zonneveld (http://kvz.io)
  //   example 1: is_null('23')
  //   returns 1: false
  //   example 2: is_null(null)
  //   returns 2: true

  return (mixedVar === null)
}
{% endcodeblock %}