phpjs/_octopress/source/functions/utf8_encode/_comments.html

php.js offers community built php functions in javascript

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<strong>
<a href="http://brett-zamir.me" rel="nofollow">Brett Zamir</a>
</strong>
on 2012-06-16 07:39:00 <br />
@kirilloid: Looks like your fix was added to Git.
<hr />


<strong>
ferliplex
</strong>
on 2012-05-11 11:58:34 <br />
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<strong>
<a href="kirilloid.ru" rel="nofollow">kirilloid</a>
</strong>
on 2012-02-08 18:21:30 <br />
String.fromCharCode accepts several arguments.
Replacing lines 34-36 with
<pre><code>    enc = String.fromCharCode((c1 &gt;&gt; 6) | 192, (c1 &amp; 63) | 128);
} else {
    enc = String.fromCharCode((c1 &gt;&gt; 12) | 224, ((c1 &gt;&gt; 6) &amp; 63) | 128, (c1 &amp; 63) | 128);</code></pre>
may reduce execution time from 20x to 12x on mostly non-ascii strings (e.g. cyrillic text).
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<strong>
<a href="http://brett-zamir.me" rel="nofollow">Brett Zamir</a>
</strong>
on 2011-05-02 04:24:45 <br />
@Gajus: JavaScript uses Unicode internally, even if your document is encoded in ISO-8859-1. This function should only be needed if you have a string already using that encoding (or otherwise you are double-encoding). You could provide the codepoints you have, and what you expect it to return.
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<strong>
<a href="http://guy.lt" rel="nofollow">Gajus</a>
</strong>
on 2011-05-01 11:31:05 <br />
Doesn't work with the following string:
€,´,€,´,水,Д,Є
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<strong>
<a href="http://haloindex.com" rel="nofollow">Soulcyon</a>
</strong>
on 2011-04-07 09:18:37 <br />
<pre><code>
function utf8_encode(){
    var str = arguments[0] + &quot;&quot;,
        len = str.length - 1,
        i = -1,
        result = &quot;&quot;;
        
    while( !!(i++ - len) ){
        var c = str.charCodeAt(i),
            ops = [
                c,
                (c &gt;&gt; 6 | 192) + (c &amp; 63 | 128),
                (c &gt;&gt; 12 | 224) + (c &gt;&gt; 6 &amp; 63 | 128) + (c &amp; 63 | 128)
            ],
            i =  c &lt; 128 ? 0 : c &lt; 2048 ? 1 : 2;
        result += String.fromCharCode(ops[i]);
    }
    return result;
}
</code></pre>
<hr />


<strong>
<a href="http://brett-zamir.me" rel="nofollow">Brett Zamir</a>
</strong>
on 2011-01-15 18:25:28 <br />
@Manu: What are you trying to do? Do you have some sample code?
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<strong>
Manu
</strong>
on 2011-01-10 10:07:40 <br />
this function doesnt work for me
Do i have to declare the Javascript version?
<hr />


<strong>
<a href="http://activeanalytics.com" rel="nofollow">Anthon Pang</a>
</strong>
on 2011-01-09 18:26:21 <br />
Patch using Eli's suggestion (though, he posted the equivalent for utf8_decode):

<pre><code>
--- utf8_encode.js.old	2011-01-09 12:23:22.000000000 -0500
+++ utf8_encode.js	2011-01-09 12:23:49.000000000 -0500
@@ -11,6 +11,10 @@
     // *     example 1: utf8_encode('Kevin van Zonneveld');
     // *     returns 1: 'Kevin van Zonneveld'
 
+    if (typepof window.encodeURIComponent !== 'undefined') {
+        return unescape( window.encodeURIComponent( argString ));
+    }
+
     var string = (argString+''); // .replace(/\r\n/g, &quot;\n&quot;).replace(/\r/g, &quot;\n&quot;);
 
     var utftext = &quot;&quot;;
</code></pre>
<hr />


<strong>
<a href="http://activeanalytics.com" rel="nofollow">Anthon Pang</a>
</strong>
on 2011-01-08 22:00:49 <br />
Eli.  That's not cross browser portable, plus it won't work with some input, e.g., &quot;malformed URI sequence&quot; errors on FF.
<hr />


<strong>
<a href="http://eligrey.com/" rel="nofollow">Eli Grey</a>
</strong>
on 2010-09-19 00:30:35 <br />
This entire function can be replaced with the following.

<pre><code>
function utf8_encode (argString) {
    return decodeURIComponent(escape(argString));
}
</code></pre>
<hr />


<strong>
<a href="http://brett-zamir.me" rel="nofollow">Brett Zamir</a>
</strong>
on 2010-04-10 18:47:47 <br />
@Cristián: I think what happened is that you must have copied the text directly from this page, but the commenting code often messes up the new lines. To get a pristine version (and the latest version), use the link &quot;raw js source&quot;...
<hr />


<strong>
<a href="http://www.cristianperez.com" rel="nofollow"></a>
</strong>
on 2010-04-07 10:41:25 <br />
Hey, you have an error.
You are using into the code the object string.*, but the argument name is &quot;argString&quot; instead of &quot;string&quot;.

Using argString instead of string it works correctly
<hr />


<strong>
<a href="www.vuware.com" rel="nofollow">Keith</a>
</strong>
on 2009-12-01 02:28:26 <br />
This function will throw an exception if passed an empty string.

I think it needs to include &quot;<pre><code>try {} catch(e) {} return'';</code></pre>&quot; around its contents and the following line at the start: 

<pre><code>
 if (argString == '') return '';
</code></pre>
<hr />


<strong>
<a href="www.digimulti.com" rel="nofollow">Ben Pettit</a>
</strong>
on 2009-05-05 01:16:41 <br />
I made a fix so this function ran correctly in adobe javascript.

<pre><code>
function utf8_encode ( string ) {
    // Encodes an ISO-8859-1 string to UTF-8  
    // 
    // version: 812.316
    // discuss at: http://phpjs.org/functions/utf8_encode
    // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: sowberry
    // +    tweaked by: Jack
    // +   bugfixed by: Onno Marsman
    // +   improved by: Yves Sucaet
    // +   bugfixed by: Onno Marsman
    // +   adobe js by: Ben Pettit
    // *     example 1: utf8_encode('Kevin van Zonneveld');
    // *     returns 1: 'Kevin van Zonneveld'
    string	=	string.valueOf(); //    &lt;-bp:  I added this line.
    
    string = (string+'').replace(/\r\n/g, &quot;\n&quot;).replace(/\r/g, &quot;\n&quot;);

    var utftext = &quot;&quot;;
    var start, end;
    var stringl = 0;
</code></pre>
<hr />


<strong>
<a href="http://kevin.vanzonneveld.net" rel="nofollow">Kevin van Zonneveld</a>
</strong>
on 2008-11-14 14:06:32 <br />
@ Onno Marsman: Sjeesh, it has been a long day... But that long.. Thx Onno.
<hr />


<strong>
Onno Marsman
</strong>
on 2008-11-14 12:06:00 <br />
This is just weird. Of course the extra (string+'') is not necessary. The following would do exactly the same:

<pre><code>
string = (string+'').replace(/\r\n/g, &amp;quot;\n&amp;quot;).replace(/\r/g, &amp;quot;\n&amp;quot;);
</code></pre>

or even something like (not tested):
<pre><code>
string = (string+'').replace(/\r\n?/g, &amp;quot;\n&amp;quot;);
</code></pre>
<hr />


<strong>
<a href="http://kevin.vanzonneveld.net" rel="nofollow">Kevin van Zonneveld</a>
</strong>
on 2008-11-13 23:21:56 <br />
@ Yves Sucaet: I don't see the harm in that :) thank you Yves!
<hr />


<strong>
Yves Sucaet
</strong>
on 2008-11-12 21:15:28 <br />
I think it makes sense to replace
<pre><code>
string = (string+'').replace(/\r\n/g,&amp;quot;\n&amp;quot;);
</code></pre>

with 

<pre><code>
string = (string+'').replace(/\r\n/g,&amp;quot;\n&amp;quot;);
string = (string+'').replace(/\r/g,&amp;quot;\n&amp;quot;);
</code></pre>
<hr />


<strong>
<a href="http://kevin.vanzonneveld.net" rel="nofollow">Kevin van Zonneveld</a>
</strong>
on 2008-08-27 18:14:23 <br />
@ sowberry: Thank you for your improvement!
<hr />


<strong>
sowberry
</strong>
on 2008-08-08 17:50:42 <br />
While looking for a javascript crc script, I found the version on webtoolkit.info as well as your subsequent modification.

Testing with a chunk of text a couple hundred characters long, with just a couple non-ascii values, I saw no significant improvement with your approach of using an array as a pseudo-StringBuilder.  The issue is the use of String.fromCharCode for even ascii values, which forces too many string creations.  The code below is about 3 times faster in my tests:

<pre><code>
function utf8_encode(string) {
    string = string.replace(/\r\n/g,&amp;quot;\n&amp;quot;);
    var utftext = &amp;quot;&amp;quot;;
    var start, end;

    start = end = 0;
    for (var n = 0; n &amp;lt; string.length; n++) {

        var c = string.charCodeAt(n);
        var enc = null;

        if (c &amp;lt; 128) {
            end++;
        }
        else if((c &amp;gt; 127) &amp;amp;&amp;amp; (c &amp;lt; 2048)) {
            enc = String.fromCharCode((c &amp;gt;&amp;gt; 6) | 192) + String.fromCharCode((c &amp;amp; 63) | 128);
        }
        else {
            enc = String.fromCharCode((c &amp;gt;&amp;gt; 12) | 224) + String.fromCharCode(((c &amp;gt;&amp;gt; 6) &amp;amp; 63) | 128) + String.fromCharCode((c &amp;amp; 63) | 128);
        }
        if (enc != null)
        {
            if (end &amp;gt; start)
            {
                utftext += string.substring(start, end);
            }
            utftext += enc;
            start = end = n+1;
        }

    }
    if (end &amp;gt; start)
    {
        utftext += string.substring(start, string.length);
    }

    return utftext;
}
</code></pre>

Please feel free to post this to the various script repositories, as I am not especially active on the web.  Thanks.
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