PHP's echo in JavaScript

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

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module.exports = function echo () {
// discuss at: http://locutus.io/php/echo/
// original by: Philip Peterson
// improved by: echo is bad
// improved by: Nate
// improved by: Brett Zamir (http://brett-zamir.me)
// improved by: Brett Zamir (http://brett-zamir.me)
// improved by: Brett Zamir (http://brett-zamir.me)
// revised by: Der Simon (http://innerdom.sourceforge.net/)
// bugfixed by: Eugene Bulkin (http://doubleaw.com/)
// bugfixed by: Brett Zamir (http://brett-zamir.me)
// bugfixed by: Brett Zamir (http://brett-zamir.me)
// bugfixed by: EdorFaus
// note 1: In 1.3.2 and earlier, this function wrote to the body of the document when it
// note 1: was called in webbrowsers, in addition to supporting XUL.
// note 1: This involved >100 lines of boilerplate to do this in a safe way.
// note 1: Since I can't imageine a complelling use-case for this, and XUL is deprecated
// note 1: I have removed this behavior in favor of just calling `console.log`
// note 2: You'll see functions depends on `echo` instead of `console.log` as we'll want
// note 2: to have 1 contact point to interface with the outside world, so that it's easy
// note 2: to support other ways of printing output.
// revised by: Kevin van Zonneveld (http://kvz.io)
// input by: JB
// example 1: echo('Hello world')
// returns 1: undefined
var args = Array.prototype.slice.call(arguments)
return console.log(args.join(' '))
}
[ View on GitHub | Edit on GitHub | Source on GitHub ]

How to use

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

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

ES5/ES6

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.

Notes

  • In 1.3.2 and earlier, this function wrote to the body of the document when it was called in webbrowsers, in addition to supporting XUL. This involved >100 lines of boilerplate to do this in a safe way. Since I can’t imageine a complelling use-case for this, and XUL is deprecated I have removed this behavior in favor of just calling console.log

  • You’ll see functions depends on echo instead of console.log as we’ll want to have 1 contact point to interface with the outside world, so that it’s easy to support other ways of printing output.

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
1echo('Hello world')undefined

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