---
layout: page
title: "JavaScript gmmktime function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/gmmktime:779
- /functions/view/gmmktime
- /functions/view/779
- /functions/gmmktime:779
- /functions/779
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's gmmktime

{% codeblock datetime/gmmktime.js lang:js https://raw.github.com/kvz/phpjs/master/functions/datetime/gmmktime.js raw on github %}
function gmmktime () {
  // From: http://phpjs.org/functions
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // +   derived from: mktime
  // *     example 1: gmmktime(14, 10, 2, 2, 1, 2008);
  // *     returns 1: 1201875002
  // *     example 2: gmmktime(0, 0, -1, 1, 1, 1970);
  // *     returns 2: -1
  var d = new Date(),
    r = arguments,
    i = 0,
    e = ['Hours', 'Minutes', 'Seconds', 'Month', 'Date', 'FullYear'];

  for (i = 0; i < e.length; i++) {
    if (typeof r[i] === 'undefined') {
      r[i] = d['getUTC' + e[i]]();
      r[i] += (i === 3); // +1 to fix JS months.
    } else {
      r[i] = parseInt(r[i], 10);
      if (isNaN(r[i])) {
        return false;
      }
    }
  }

  // Map years 0-69 to 2000-2069 and years 70-100 to 1970-2000.
  r[5] += (r[5] >= 0 ? (r[5] <= 69 ? 2e3 : (r[5] <= 100 ? 1900 : 0)) : 0);

  // Set year, month (-1 to fix JS months), and date.
  // !This must come before the call to setHours!
  d.setUTCFullYear(r[5], r[3] - 1, r[4]);

  // Set hours, minutes, and seconds.
  d.setUTCHours(r[0], r[1], r[2]);

  // Divide milliseconds by 1000 to return seconds and drop decimal.
  // Add 1 second if negative or it'll be off from PHP by 1 second.
  return (d.getTime() / 1e3 >> 0) - (d.getTime() < 0);
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
gmmktime(14, 10, 2, 2, 1, 2008);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
1201875002
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
gmmktime(0, 0, -1, 1, 1, 1970);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
-1
{% endcodeblock %}


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