PHP's str_ireplace in JavaScript

How to use

You you can install via yarn add locutus and require this function via const str_ireplace = require('locutus/php/strings/str_ireplace').

It is important to use a bundler that supports tree-shaking so that you only ship the functions that you actually use to your browser, instead of all of Locutus, which is massive. Examples are: Parcel, webpack, or rollup.js. For server-side use this is typically less of a concern.

Examples

Please note that these examples are distilled from test cases that automatically verify our functions still work correctly. This could explain some quirky ones.

#	code	expected result
1	str_ireplace('M', 'e', 'name')	'naee'
2	var $countObj = {} str_ireplace('M', 'e', 'name', $countObj) var $result = $countObj.value	1
3	str_ireplace('', '.', 'aaa')	'aaa'

Notes

• Case-insensitive version of str_replace() Compliant with PHP 5.0 str_ireplace() Full details at: https://ca3.php.net/manual/en/function.str-ireplace.php

• The countObj parameter (optional) if used must be passed in as a object. The count will then be written by reference into it’s value property

Here’s what our current JavaScript equivalent to PHP's str_ireplace looks like.

module.exports = function str_ireplace(search, replace, subject, countObj) {
  //  discuss at: https://locutus.io/php/str_ireplace/
  // original by: Glen Arason (https://CanadianDomainRegistry.ca)
  // bugfixed by: Mahmoud Saeed
  //      note 1: Case-insensitive version of str_replace()
  //      note 1: Compliant with PHP 5.0 str_ireplace() Full details at:
  //      note 1: https://ca3.php.net/manual/en/function.str-ireplace.php
  //      note 2: The countObj parameter (optional) if used must be passed in as a
  //      note 2: object. The count will then be written by reference into it's `value` property
  //   example 1: str_ireplace('M', 'e', 'name')
  //   returns 1: 'naee'
  //   example 2: var $countObj = {}
  //   example 2: str_ireplace('M', 'e', 'name', $countObj)
  //   example 2: var $result = $countObj.value
  //   returns 2: 1
  //   example 3: str_ireplace('', '.', 'aaa')
  //   returns 3: 'aaa'

  let i = 0
  let j = 0
  let temp = ''
  let repl = ''
  let sl = 0
  let fl = 0
  let f = ''
  let r = ''
  let s = ''
  let ra = ''
  let otemp = ''
  let oi = ''
  let ofjl = ''
  let os = subject
  const osa = Object.prototype.toString.call(os) === '[object Array]'
  // var sa = ''

  if (typeof search === 'object') {
    temp = search
    search = []
    for (i = 0; i < temp.length; i += 1) {
      search[i] = temp[i].toLowerCase()
    }
  } else {
    search = search.toLowerCase()
  }

  if (typeof subject === 'object') {
    temp = subject
    subject = []
    for (i = 0; i < temp.length; i += 1) {
      subject[i] = temp[i].toLowerCase()
    }
  } else {
    subject = subject.toLowerCase()
  }

  if (typeof search === 'object' && typeof replace === 'string') {
    temp = replace
    replace = []
    for (i = 0; i < search.length; i += 1) {
      replace[i] = temp
    }
  }

  temp = ''
  f = [].concat(search)
  r = [].concat(replace)
  ra = Object.prototype.toString.call(r) === '[object Array]'
  s = subject
  // sa = Object.prototype.toString.call(s) === '[object Array]'
  s = [].concat(s)
  os = [].concat(os)

  if (countObj) {
    countObj.value = 0
  }

  for (i = 0, sl = s.length; i < sl; i++) {
    if (s[i] === '') {
      continue
    }
    for (j = 0, fl = f.length; j < fl; j++) {
      if (f[j] === '') {
        continue
      }
      temp = s[i] + ''
      repl = ra ? (r[j] !== undefined ? r[j] : '') : r[0]
      s[i] = temp.split(f[j]).join(repl)
      otemp = os[i] + ''
      oi = temp.indexOf(f[j])
      ofjl = f[j].length
      if (oi >= 0) {
        os[i] = otemp.split(otemp.substr(oi, ofjl)).join(repl)
      }

      if (countObj) {
        countObj.value += temp.split(f[j]).length - 1
      }
    }
  }

  return osa ? os : os[0]
}

A community effort

Not unlike Wikipedia, Locutus is an ongoing community effort. Our philosophy follows The McDonald’s Theory. This means that we assimilate first iterations with imperfections, hoping for others to take issue with-and improve them. This unorthodox approach has worked very well to foster fun and fruitful collaboration, but please be reminded to use our creations at your own risk. THE SOFTWARE IS PROVIDED "AS IS" has never been more true than for Locutus.

Now go and: [ View on GitHub | Edit on GitHub | View Raw ]

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