PHP's http_build_query in JavaScript

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

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How to use

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

If you intend to target the browser, you can then use a module bundler such as Browserify, webpack or rollup.js.


This function targets ES5, but as of Locutus 2.0.2 we also support ES6 functions. Locutus transpiles 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.


  • If the value is null, key and value are skipped in the http_build_query of PHP while in locutus they are not.


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
1http_build_query({foo: 'bar', php: 'hypertext processor', baz: 'boom', cow: 'milk'}, '', '&')'foo=bar&php=hypertext+processor&baz=boom&cow=milk'
2http_build_query({'php': 'hypertext processor', 0: 'foo', 1: 'bar', 2: 'baz', 3: 'boom', 'cow': 'milk'}, 'myvar_')'myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_3=boom&php=hypertext+processor&cow=milk'
3http_build_query({foo: 'bar', php: 'hypertext processor', baz: 'boom', cow: 'milk'}, '', '&', 'PHP_QUERY_RFC3986')'foo=bar&php=hypertext%20processor&baz=boom&cow=milk'

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