phpjs/_octopress/source/functions/ip2long/index.markdown

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript ip2long function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/ip2long:436
- /functions/view/ip2long
- /functions/view/436
- /functions/ip2long:436
- /functions/436
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's ip2long

{% codeblock network/ip2long.js lang:js https://raw.github.com/kvz/phpjs/master/functions/network/ip2long.js raw on github %}
function ip2long (IP) {
  // From: http://phpjs.org/functions
  // +   original by: Waldo Malqui Silva
  // +   improved by: Victor
  // +    revised by: fearphage (http://http/my.opera.com/fearphage/)
  // +    revised by: Theriault
  // *     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
  var 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.
  IP = IP.match(/^([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]+))?$/i); // Verify IP format.
  if (!IP) {
    return false; // Invalid format.
  }
  // Reuse IP variable for component counter.
  IP[0] = 0;
  for (i = 1; i < 5; i += 1) {
    IP[0] += !! ((IP[i] || '').length);
    IP[i] = parseInt(IP[i]) || 0;
  }
  // Continue to use IP for overflow values.
  // PHP does not allow any component to overflow.
  IP.push(256, 256, 256, 256);
  // Recalculate overflow of last component supplied to make up for missing components.
  IP[4 + IP[0]] *= Math.pow(256, 4 - IP[0]);
  if (IP[1] >= IP[5] || IP[2] >= IP[6] || IP[3] >= IP[7] || IP[4] >= IP[8]) {
    return false;
  }
  return IP[1] * (IP[0] === 1 || 16777216) + IP[2] * (IP[0] <= 2 || 65536) + IP[3] * (IP[0] <= 3 || 256) + IP[4] * 1;
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/network/ip2long.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/network/ip2long.js)

### Example 1
This code
{% codeblock lang:js example %}
ip2long('192.0.34.166');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
3221234342
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
ip2long('0.0xABCDEF');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
11259375
{% endcodeblock %}

### Example 3
This code
{% codeblock lang:js example %}
ip2long('255.255.255.256');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
false
{% endcodeblock %}


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