PHP's ip2long in JavaScript

Here’s what our current JavaScript equivalent to PHP's ip2long looks like.

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module.exports = function ip2long (argIP) {
// discuss at: http://locutus.io/php/ip2long/
// original by: Waldo Malqui Silva (http://waldo.malqui.info)
// improved by: Victor
// revised by: fearphage (http://http/my.opera.com/fearphage/)
// revised by: Theriault (https://github.com/Theriault)
// estarget: es2015
// example 1: ip2long('192.0.34.166')
// returns 1: 3221234342
// example 2: ip2long('0.0xABCDEF')
// returns 2: 11259375
// example 3: ip2long('255.255.255.256')
// returns 3: false

let i = 0
// PHP allows decimal, octal, and hexadecimal IP components.
// PHP allows between 1 (e.g. 127) to 4 (e.g 127.0.0.1) components.

const pattern = new RegExp([
'^([1-9]\\d*|0[0-7]*|0x[\\da-f]+)',
'(?:\\.([1-9]\\d*|0[0-7]*|0x[\\da-f]+))?',
'(?:\\.([1-9]\\d*|0[0-7]*|0x[\\da-f]+))?',
'(?:\\.([1-9]\\d*|0[0-7]*|0x[\\da-f]+))?$'
].join(''), 'i')

argIP = argIP.match(pattern) // Verify argIP format.
if (!argIP) {
// Invalid format.
return false
}
// Reuse argIP variable for component counter.
argIP[0] = 0
for (i = 1; i < 5; i += 1) {
argIP[0] += !!((argIP[i] || '').length)
argIP[i] = parseInt(argIP[i]) || 0
}
// Continue to use argIP for overflow values.
// PHP does not allow any component to overflow.
argIP.push(256, 256, 256, 256)
// Recalculate overflow of last component supplied to make up for missing components.
argIP[4 + argIP[0]] *= Math.pow(256, 4 - argIP[0])
if (argIP[1] >= argIP[5] ||
argIP[2] >= argIP[6] ||
argIP[3] >= argIP[7] ||
argIP[4] >= argIP[8]) {
return false
}

return argIP[1] * (argIP[0] === 1 || 16777216) +
argIP[2] * (argIP[0] <= 2 || 65536) +
argIP[3] * (argIP[0] <= 3 || 256) +
argIP[4] * 1
}
[ 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/network/ip2long'). You could also require the network module in full so that you could access network.ip2long instead.

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

ES5/ES6

Even though the function you see here is written for ES6, we transpile all functions down to ES5 before we publish to npm, meaning you don't have to transpile yourself when you require Locutus that way.

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.

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
1ip2long('192.0.34.166')3221234342
2ip2long('0.0xABCDEF')11259375
3ip2long('255.255.255.256')false

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