---
warning: 'This file is auto generated by `npm run web:inject`, do not edit by hand'
examples:
  - boolval(true)
  - boolval(false)
  - boolval(0)
  - boolval(0.0)
  - boolval('')
  - boolval('0')
  - 'boolval([])'
  - boolval('')
  - boolval(null)
  - boolval(undefined)
  - boolval('true')
estarget: es5
returns:
  - 'true'
  - 'false'
  - 'false'
  - 'false'
  - 'false'
  - 'false'
  - 'false'
  - 'false'
  - 'false'
  - 'false'
  - 'true'
dependencies: []
authors:
  original by:
    - Will Rowe
notes: []
type: function
layout: function
title: PHP's boolval in JavaScript
description: >-
  Here’s what our current JavaScript equivalent to <a
  href="http://php.net/manual/en/function.boolval.php">PHP's boolval</a> looks
  like.
function: boolval
category: var
language: php
permalink: php/var/boolval/
alias:
  - /functions/php/boolval/
  - /functions/var/boolval/
  - /php/boolval/
  - /functions/boolval/
---
{% codeblock lang:javascript %}module.exports = function boolval (mixedVar) {
  // original by: Will Rowe
  //   example 1: boolval(true)
  //   returns 1: true
  //   example 2: boolval(false)
  //   returns 2: false
  //   example 3: boolval(0)
  //   returns 3: false
  //   example 4: boolval(0.0)
  //   returns 4: false
  //   example 5: boolval('')
  //   returns 5: false
  //   example 6: boolval('0')
  //   returns 6: false
  //   example 7: boolval([])
  //   returns 7: false
  //   example 8: boolval('')
  //   returns 8: false
  //   example 9: boolval(null)
  //   returns 9: false
  //   example 10: boolval(undefined)
  //   returns 10: false
  //   example 11: boolval('true')
  //   returns 11: true

  if (mixedVar === false) {
    return false
  }

  if (mixedVar === 0 || mixedVar === 0.0) {
    return false
  }

  if (mixedVar === '' || mixedVar === '0') {
    return false
  }

  if (Array.isArray(mixedVar) && mixedVar.length === 0) {
    return false
  }

  if (mixedVar === null || mixedVar === undefined) {
    return false
  }

  return true
}
{% endcodeblock %}