---
layout: page
title: "JavaScript strncmp function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/strncmp:543
- /functions/view/strncmp
- /functions/view/543
- /functions/strncmp:543
- /functions/543
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's strncmp

{% codeblock strings/strncmp.js lang:js https://raw.github.com/kvz/phpjs/master/functions/strings/strncmp.js raw on github %}
function strncmp (str1, str2, lgth) {
  // From: http://phpjs.org/functions
  // +      original by: Waldo Malqui Silva
  // +         input by: Steve Hilder
  // +      improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +       revised by: gorthaur
  // + reimplemented by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: strncmp('aaa', 'aab', 2);
  // *     returns 1: 0
  // *     example 2: strncmp('aaa', 'aab', 3 );
  // *     returns 2: -1
  var s1 = (str1 + '').substr(0, lgth);
  var s2 = (str2 + '').substr(0, lgth);

  return ((s1 == s2) ? 0 : ((s1 > s2) ? 1 : -1));
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
strncmp('aaa', 'aab', 2);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
0
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
strncmp('aaa', 'aab', 3 );
{% endcodeblock %}

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


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