December 4th, 2009
Fixing htmlentities for xml - 2
I am starting to use Google Chrome more often and doing this made me notice that one of my Javascript functions wasn’t working properly. A little bit of digging revealed that Chrome did not like the XML I was feeding it.
Entity '¡' not defined
The code generating the XML was using the PHP function htmlentities to filter its output but this does not generate valid XML. Named entities such as " and & need to be represented by their Unicode values: " and &
A handy table with all the required replacements can be found at Carlos Ouro’s website.
Below is a simple function that replaces all the named HTML entities found in a string with their numeric HTML/XML counterparts.
Example Usage
# Test #1
$test = "" Hello World! "";
echo xmlentities($test) . PHP_EOL;
# Test #2
$test = "\"Hello World\"";
echo xmlentities( htmlentities($test) ) . PHP_EOL;
$test = "" Hello World! "";
echo xmlentities($test) . PHP_EOL;
# Test #2
$test = "\"Hello World\"";
echo xmlentities( htmlentities($test) ) . PHP_EOL;
XMLEntities function
function xmlentities($string)
{
// Convert HTML entities to XML
// http://techtrouts.com/webkit-entity-nbsp-not-defined-convert-html-entities-to-xml/
$htmlentities = array( ""","&","<",">"," ","¡","¢","£","¤","¥","¦","§","¨","©","ª","«","¬","­","®","¯","°","±","²","³","´","µ","¶","·","¸","¹","º","»","¼","½","¾","¿","À","Á","Â","Ã","Ä","Å","Æ","Ç","È","É","Ê","Ë","Ì","Í","Î","Ï","Ð","Ñ","Ò","Ó","Ô","Õ","Ö","×","Ø","Ù","Ú","Û","Ü","Ý","Þ","ß","à","á","â","ã","ä","å","æ","ç","è","é","ê","ë","ì","í","î","ï","ð","ñ","ò","ó","ô","õ","ö","÷","ø","ù","ú","û","ü","ý","þ","ÿ","€");
$xmlentities = array(""","&","<",">"," ","¡","¢","£","¤","¥","¦","§","¨","©","ª","«","¬","­","®","¯","°","±","²","³","´","µ","¶","·","¸","¹","º","»","¼","½","¾","¿","À","Á","Â","Ã","Ä","Å","Æ","Ç","È","É","Ê","Ë","Ì","Í","Î","Ï","Ð","Ñ","Ò","Ó","Ô","Õ","Ö","×","Ø","Ù","Ú","Û","Ü","Ý","Þ","ß","à","á","â","ã","ä","å","æ","ç","è","é","ê","ë","ì","í","î","ï","ð","ñ","ò","ó","ô","õ","ö","÷","ø","ù","ú","û","ü","ý","þ","ÿ","€" );
// HTML entities are case-sensitive (http://htmlhelp.com/reference/html40/entities/)
return str_replace($htmlentities,$xmlentities,$string);
}
{
// Convert HTML entities to XML
// http://techtrouts.com/webkit-entity-nbsp-not-defined-convert-html-entities-to-xml/
$htmlentities = array( ""","&","<",">"," ","¡","¢","£","¤","¥","¦","§","¨","©","ª","«","¬","­","®","¯","°","±","²","³","´","µ","¶","·","¸","¹","º","»","¼","½","¾","¿","À","Á","Â","Ã","Ä","Å","Æ","Ç","È","É","Ê","Ë","Ì","Í","Î","Ï","Ð","Ñ","Ò","Ó","Ô","Õ","Ö","×","Ø","Ù","Ú","Û","Ü","Ý","Þ","ß","à","á","â","ã","ä","å","æ","ç","è","é","ê","ë","ì","í","î","ï","ð","ñ","ò","ó","ô","õ","ö","÷","ø","ù","ú","û","ü","ý","þ","ÿ","€");
$xmlentities = array(""","&","<",">"," ","¡","¢","£","¤","¥","¦","§","¨","©","ª","«","¬","­","®","¯","°","±","²","³","´","µ","¶","·","¸","¹","º","»","¼","½","¾","¿","À","Á","Â","Ã","Ä","Å","Æ","Ç","È","É","Ê","Ë","Ì","Í","Î","Ï","Ð","Ñ","Ò","Ó","Ô","Õ","Ö","×","Ø","Ù","Ú","Û","Ü","Ý","Þ","ß","à","á","â","ã","ä","å","æ","ç","è","é","ê","ë","ì","í","î","ï","ð","ñ","ò","ó","ô","õ","ö","÷","ø","ù","ú","û","ü","ý","þ","ÿ","€" );
// HTML entities are case-sensitive (http://htmlhelp.com/reference/html40/entities/)
return str_replace($htmlentities,$xmlentities,$string);
}
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