---
layout: page
title: "JavaScript str_ireplace function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/str_ireplace:524
- /functions/view/str_ireplace
- /functions/view/524
- /functions/str_ireplace:524
- /functions/524
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's str_ireplace

{% codeblock strings/str_ireplace.js lang:js https://raw.github.com/kvz/phpjs/master/functions/strings/str_ireplace.js raw on github %}
function str_ireplace (search, replace, subject) {
  // From: http://phpjs.org/functions
  // +   original by: Martijn Wieringa
  // +      input by: penutbutterjelly
  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +    tweaked by: Jack
  // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   bugfixed by: Onno Marsman
  // +      input by: Brett Zamir (http://brett-zamir.me)
  // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   bugfixed by: Philipp Lenssen
  // *     example 1: str_ireplace('l', 'l', 'HeLLo');
  // *     returns 1: 'Hello'
  // *     example 2: str_ireplace('$', 'foo', '$bar');
  // *     returns 2: 'foobar'
  var i, k = '';
  var searchl = 0;
  var reg;

  var escapeRegex = function (s) {
    return s.replace(/([\\\^\$*+\[\]?{}.=!:(|)])/g, '\\$1');
  };

  search += '';
  searchl = search.length;
  if (Object.prototype.toString.call(replace) !== '[object Array]') {
    replace = [replace];
    if (Object.prototype.toString.call(search) === '[object Array]') {
      // If search is an array and replace is a string,
      // then this replacement string is used for every value of search
      while (searchl > replace.length) {
        replace[replace.length] = replace[0];
      }
    }
  }

  if (Object.prototype.toString.call(search) !== '[object Array]') {
    search = [search];
  }
  while (search.length > replace.length) {
    // If replace has fewer values than search,
    // then an empty string is used for the rest of replacement values
    replace[replace.length] = '';
  }

  if (Object.prototype.toString.call(subject) === '[object Array]') {
    // If subject is an array, then the search and replace is performed
    // with every entry of subject , and the return value is an array as well.
    for (k in subject) {
      if (subject.hasOwnProperty(k)) {
        subject[k] = str_ireplace(search, replace, subject[k]);
      }
    }
    return subject;
  }

  searchl = search.length;
  for (i = 0; i < searchl; i++) {
    reg = new RegExp(escapeRegex(search[i]), 'gi');
    subject = subject.replace(reg, replace[i]);
  }

  return subject;
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/strings/str_ireplace.js)

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are 
the closest match to this hashtable-like data structure. 

Please also note that php.js offers community built functions and goes by the 
[McDonald's Theory](https://medium.com/what-i-learned-building/9216e1c9da7d). We'll put online 
functions that are far from perfect, in the hopes to spark better contributions. 
Do you have one? Then please just: 

 - [Edit on GitHub](https://github.com/kvz/phpjs/edit/master/functions/strings/str_ireplace.js)

### Example 1
This code
{% codeblock lang:js example %}
str_ireplace('l', 'l', 'HeLLo');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
'Hello'
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
str_ireplace('$', 'foo', '$bar');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
'foobar'
{% endcodeblock %}


### Other PHP functions in the strings extension
{% render_partial _includes/custom/strings.html %}