I have this PHP regex for remove utf8 special characters from strings:
[\x00-\x1F]|\xC2[\x80-\x9F]|\xE2[\x80-\x8F]{2}|\xE2\x80[\xA4-\xA8]|\xE2\x81[\x9F-\xAF]
I need to convert it to Javascript regex. I tryed this code:
str = str.replace(/[\x00-\x1F]|\xC2[\x80-\x9F]|\xE2[\x80-\x8F]{2}|\xE2\x80[\xA4-\xA8]|\xE2\x81[\x9F-\xAF]/g, '');
But it does nothing.
I need your help. Thank you.
Simple mistake, big effect:
strTest = strTest.replace(/your regex here/g, "$1");
// ----------------------------------------^
without the "global" flag, the replace occurs for the first match only.
Side note: To remove any character that does not fulfill some kind of complex condition, like falling into a set of certain Unicode character ranges, you can use negative lookahead:
var regex = /(?![\x00-\x7F]|[\xC0-\xDF][\x80-\xBF]|[\xE0-\xEF][\x80-\xBF]{2}|[\xF0-\xF7][\x80-\xBF]{3})./g;
strTest = strTest.replace(regex, "")
where regex reads as
(?! # negative look-ahead: a position *not followed by*: […] # any allowed character range from above ) # end lookahead . # match this character (only if previous condition is met!)
Try this :
str = str.replace(/[\x00-\x1F]|\xC2[\x80-\x9F]|\xE2[\x80-\x8F]{2}|\xE2\x80[\xA4-\xA8]|\xE2\x81[\x9F-\xAF]/gi, '');
