JavaScript str_ireplace

Replaces all occurrences of search in haystack with replace / case-insensitive

function str_ireplace ( search, replace, subject ) {
    // Replaces all occurrences of search in haystack with replace / case-insensitive  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/str_ireplace    // +   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 (!(replace instanceof Array)) {
        replace = [replace];        if (search instanceof 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 (!(search instanceof 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 (subject instanceof 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;
}

external links: original PHP docs | raw js source

Examples

» Example 1

Running

1	str_ireplace('l', 'l', 'HeLLo');

Should return

'Hello'

» Example 2

Running

1	str_ireplace('$', 'foo', '$bar');

Should return

'foobar'

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have str_ireplace goodness in JavaScript.

Martijn Wieringa ( original )
penutbutterjelly ( input )
Brett Zamir ( input )
Kevin van Zonneveld ( improved bugfixed )
Jack ( tweaked )
Onno Marsman ( bugfixed )
Philipp Lenssen ( bugfixed )

Comments

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Use:

[CODE]
your_stuff('here');
[/CODE]

for proper code formatting
By submitting code here you are allowing us to use it in php.js hence dual licensing it under the MIT and GPL licenses

Leandro Angelo
Jul 22nd

Boa funciona legal, e igual o str_ireplace do PHP

Kevin van Zonneveld
9 Oct '09

@ Philipp Lenssen: Great find! Fixed it. thanks a lot!

Philipp Lenssen
7 Oct '09

(My suggested fix should work fine, the ">" problem was something else...)

Philipp Lenssen
7 Oct '09

This doesn't seem to escape special regex characters, hence it doesn't work when replacing e.g. "$" with "foo", or am I missing something". The following function might help, though I still ran into problems with replacing ">"...

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

Kevin van Zonneveld
23 Mar '08

@ penutbutterjelly: I can see why that looks weird. It's because the code was made by different people though. But I've adjusted str_ireplace to match the behaviour of it's brother str_replace. Thanks for noticing!

penutbutterjelly
21 Mar '08

Why the zchmook doesn't this one support arrays as input, your str_replace does :/

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