/website/source/php/array/array_unique.html

---
warning: 'This file is auto generated by `npm run web:inject`, do not edit by hand'
examples:
  - 'array_unique([''Kevin'',''Kevin'',''van'',''Zonneveld'',''Kevin''])'
  - 'array_unique({''a'': ''green'', 0: ''red'', ''b'': ''green'', 1: ''blue'', 2: ''red''})'
returns:
  - '{0: ''Kevin'', 2: ''van'', 3: ''Zonneveld''}'
  - '{a: ''green'', 0: ''red'', 1: ''blue''}'
dependencies: []
authors:
  original by:
    - 'Carlos R. L. Rodrigues (https://www.jsfromhell.com)'
  improved by:
    - Michael Grier
  bugfixed by:
    - 'Kevin van Zonneveld (https://kvz.io)'
    - Nate
    - 'Kevin van Zonneveld (https://kvz.io)'
    - 'Brett Zamir (https://brett-zamir.me)'
  input by:
    - duncan
    - 'Brett Zamir (https://brett-zamir.me)'
notes:
  - |-
    The second argument, sort_flags is not implemented;
    also should be sorted (asort?) first according to docs
type: function
layout: function
title: PHP's array_unique in JavaScript
description: >-
  Here’s what our current JavaScript equivalent to <a
  href="https://php.net/manual/en/function.array-unique.php">PHP's
  array_unique</a> looks like.
function: array_unique
category: array
language: php
permalink: php/array/array_unique/
alias:
  - /functions/php/array_unique/
  - /functions/array/array_unique/
  - /php/array_unique/
  - /functions/array_unique/
---
{% codeblock lang:javascript %}module.exports = function array_unique (inputArr) { // eslint-disable-line camelcase
  //  discuss at: https://locutus.io/php/array_unique/
  // original by: Carlos R. L. Rodrigues (https://www.jsfromhell.com)
  //    input by: duncan
  //    input by: Brett Zamir (https://brett-zamir.me)
  // bugfixed by: Kevin van Zonneveld (https://kvz.io)
  // bugfixed by: Nate
  // bugfixed by: Kevin van Zonneveld (https://kvz.io)
  // bugfixed by: Brett Zamir (https://brett-zamir.me)
  // improved by: Michael Grier
  //      note 1: The second argument, sort_flags is not implemented;
  //      note 1: also should be sorted (asort?) first according to docs
  //   example 1: array_unique(['Kevin','Kevin','van','Zonneveld','Kevin'])
  //   returns 1: {0: 'Kevin', 2: 'van', 3: 'Zonneveld'}
  //   example 2: array_unique({'a': 'green', 0: 'red', 'b': 'green', 1: 'blue', 2: 'red'})
  //   returns 2: {a: 'green', 0: 'red', 1: 'blue'}

  let key = ''
  const tmpArr2 = {}
  let val = ''

  const _arraySearch = function (needle, haystack) {
    let fkey = ''
    for (fkey in haystack) {
      if (haystack.hasOwnProperty(fkey)) {
        if ((haystack[fkey] + '') === (needle + '')) {
          return fkey
        }
      }
    }
    return false
  }

  for (key in inputArr) {
    if (inputArr.hasOwnProperty(key)) {
      val = inputArr[key]
      if (_arraySearch(val, tmpArr2) === false) {
        tmpArr2[key] = val
      }
    }
  }

  return tmpArr2
}
{% endcodeblock %}