---
layout: page
title: "JavaScript quoted_printable_decode function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/quoted_printable_decode:834
- /functions/view/quoted_printable_decode
- /functions/view/834
- /functions/quoted_printable_decode:834
- /functions/834
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's quoted_printable_decode

{% codeblock strings/quoted_printable_decode.js lang:js https://raw.github.com/kvz/phpjs/master/functions/strings/quoted_printable_decode.js raw on github %}
function quoted_printable_decode (str) {
  // From: http://phpjs.org/functions
  // +   original by: Ole Vrijenhoek
  // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
  // +   reimplemented by: Theriault
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // +   bugfixed by: Theriault
  // *     example 1: quoted_printable_decode('a=3Db=3Dc');
  // *     returns 1: 'a=b=c'
  // *     example 2: quoted_printable_decode('abc  =20\r\n123  =20\r\n');
  // *     returns 2: 'abc   \r\n123   \r\n'
  // *     example 3: quoted_printable_decode('012345678901234567890123456789012345678901234567890123456789012345678901234=\r\n56789');
  // *     returns 3: '01234567890123456789012345678901234567890123456789012345678901234567890123456789'
  // *     example 4: quoted_printable_decode("Lorem ipsum dolor sit amet=23, consectetur adipisicing elit");
  // *     returns 4: 'Lorem ipsum dolor sit amet#, consectetur adipisicing elit'
  // Removes softline breaks
  var RFC2045Decode1 = /=\r\n/gm,
    // Decodes all equal signs followed by two hex digits
    RFC2045Decode2IN = /=([0-9A-F]{2})/gim,
    // the RFC states against decoding lower case encodings, but following apparent PHP behavior
    // RFC2045Decode2IN = /=([0-9A-F]{2})/gm,
    RFC2045Decode2OUT = function (sMatch, sHex) {
      return String.fromCharCode(parseInt(sHex, 16));
    };
  return str.replace(RFC2045Decode1, '').replace(RFC2045Decode2IN, RFC2045Decode2OUT);
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
quoted_printable_decode('a=3Db=3Dc');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
'a=b=c'
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
quoted_printable_decode('abc  =20\r\n123  =20\r\n');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
'abc   \r\n123   \r\n'
{% endcodeblock %}

### Example 3
This code
{% codeblock lang:js example %}
quoted_printable_decode('012345678901234567890123456789012345678901234567890123456789012345678901234=\r\n56789');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
'01234567890123456789012345678901234567890123456789012345678901234567890123456789'
{% endcodeblock %}


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