Get the hex code for html objects

Question

I have a line like " € ".

I want to convert it to hex to get a value like "\u20AC" so that I can send it to Flash.

The same for all currency symbols.

  £ -> \u00A3 $ -> \u0024 etc 

Answer 1

First, note that $ is not a known object in HTML 4.01 . This, however, is in HTML 5, and in PHP 5.4 you can call html_entity_decode using ENT_QUOTES | ENT_HTML5 ENT_QUOTES | ENT_HTML5 to decode it.

You must decode the object and only then convert it:

 //assumes $str is in UTF-8 (or ASCII) function foo($str) { $dec = html_entity_decode($str, ENT_QUOTES, "UTF-8"); //convert to UTF-16BE $enc = mb_convert_encoding($dec, "UTF-16BE", "UTF-8"); $out = ""; foreach (str_split($enc, 2) as $f) { $out .= "\\u" . sprintf("%04X", ord($f[0]) << 8 | ord($f[1])); } return $out; } 

If you want to replace only entities, you can use preg_replace_callback to match objects, and then use foo as a callback.

 function repl_only_ent($str) { return preg_replace_callback('/&[^;]+;/', function($m) { return foo($m[0]); }, $str); } echo repl_only_ent("€foobar ´"); 

gives:

  \ u20ACfoobar \ u00B4 

Answer 2

You can try the following function to convert to hexadecimal conversion:

 function strToHex($string) { $hex=''; for ($i=0; $i < strlen($string); $i++) { $hex .= dechex(ord($string[$i])); } return $hex; } 

From Greg Winarski , which is Google’s fourth hit .

Combined with html_entity_decode () . So something like this:

 $currency_symbol = "€"; $hex = strToHex(html_entity_decode($currency_symbol)); 

This code has not been verified and therefore may require additional modification in order to return the exact result you need.