PHP's str_ireplace in JavaScript

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

module.exports = function str_ireplace (search, replace, subject, countObj) { // eslint-disable-line camelcase
// 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]
}
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How to use

You you can install via npm install locutus and require it via require('locutus/php/strings/str_ireplace'). You could also require the strings module in full so that you could access strings.str_ireplace instead.

If you intend to target the browser, you can then use a module bundler such as Parcel, webpack, Browserify, or rollup.js. This can be important because Locutus allows modern JavaScript in the source files, meaning it may not work in all browsers without a build/transpile step. Locutus does transpile all functions to ES5 before publishing to npm.

A community effort

Not unlike Wikipedia, Locutus is an ongoing community effort. Our philosophy follows The McDonald’s Theory. This means that we don't consider it to be a bad thing that many of our functions are first iterations, which may still have their fair share of issues. We hope that these flaws will inspire others to come up with better ideas.

This way of working also means that we don't offer any production guarantees, and recommend to use Locutus inspiration and learning purposes only.

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

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.

#codeexpected result
1str_ireplace('M', 'e', 'name')'naee'
2var $countObj = {} str_ireplace('M', 'e', 'name', $countObj) var $result = $countObj.value1
3str_ireplace('', '.', 'aaa')'aaa'

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