Remove all special characters with RegExp

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I would like a RegExp that will remove all special characters from a string. I am trying something like this but it doesn’t work in IE7, though it works in Firefox.

var specialChars = "!@#$^&%*()+=-[]\/{}|:<>?,.";

for (var i = 0; i < specialChars.length; i++) {
  stringToReplace = stringToReplace.replace(new RegExp("\\" + specialChars[i], "gi"), "");

A detailed description of the RegExp would be helpful as well.

var desired = stringToReplace.replace(/[^\w\s]/gi, '')

As was mentioned in the comments it's easier to do this as a whitelist - replace the characters which aren't in your safelist.

The caret (^) character is the negation of the set [...], gi say global and case-insensitive (the latter is a bit redundant but I wanted to mention it) and the safelist in this example is digits, word characters, underscores (\w) and whitespace (\s).

Regex remove all special characters except numbers?, It really depends on your definition of special characters. I find that a whitelist rather than a blacklist is the best approach in most situations: A) Removing special characters from a string. Sometimes, your database may contain special characters. The following statement uses the REGEXP_REPLACE () function to remove special characters from a string: SELECT REGEXP_REPLACE ( 'Th♥is∞ is a dem☻o of REGEXP_♫REPLACE function', ' [^a-z_A-Z ]') FROM dual;

Note that if you still want to exclude a set, including things like slashes and special characters you can do the following:

var outString = sourceString.replace(/[`~!@#$%^&*()_|+\-=?;:'",.<>\{\}\[\]\\\/]/gi, '');

take special note that in order to also include the "minus" character, you need to escape it with a backslash like the latter group. if you don't it will also select 0-9 which is probably undesired.

Regex to remove all special characters from string?, To remove all special characters from a JavaScript string, you can try to run the following code −. Example. <html> <head> <script> var str = "@! I have custom table and there are special characters in this column. I want to remove the special characters and keep the space between the word. I try this query. select customer_ID, REGEXP_REPLACE(name, '[^0-9A-Za-z]', '') from customer. But this query removes all special characters and space.

Write a Regular Expression to remove all special characters from a , You can use a regular expression and replaceAll() method of java.lang.String class to remove all special characters from String. A special� If by "special characters" you mean less-frequently used Unicode characters like ¥, ¶, or ¼, then you can use either the function REGEXPREP or set comparison functions like ISMEMBER (and you can convert the character string to its equivalent integer code first using the function DOUBLE if needed). Here are a couple examples where all but the

The first solution does not work for any UTF-8 alphabet. (It will cut text such as Їжак). I have managed to create a function which does not use RegExp and use good UTF-8 support in the JavaScript engine. The idea is simple if a symbol is equal in uppercase and lowercase it is a special character. The only exception is made for whitespace.

function removeSpecials(str) {
    var lower = str.toLowerCase();
    var upper = str.toUpperCase();

    var res = "";
    for(var i=0; i<lower.length; ++i) {
        if(lower[i] != upper[i] || lower[i].trim() === '')
            res += str[i];
    return res;

Update: Please note, that this solution works only for languages where there are small and capital letters. In languages like Chinese, this won't work.

Update 2: I came to the original solution when I was working on a fuzzy search. If you also trying to remove special characters to implement search functionality, there is a better approach. Use any transliteration library which will produce you string only from Latin characters and then the simple Regexp will do all magic of removing special characters. (This will work for Chinese also and you also will receive side benefits by making Tromsø == Tromso).

How to remove all special characters from String in Java, We should remove all the special characters from the string so that we can read the string regex: It is the regular expression to which string is to be matched. However, if we pass it into preg_replace and remove all non-alphanumeric characters, we are left with the following: As you can see, all of the special characters have been removed. The white space included. Remove everything except letters, numbers and white spaces. If you want to keep white spaces, then you can use the following regex:

I use RegexBuddy for debbuging my regexes it has almost all languages very usefull. Than copy/paste for the targeted language. Terrific tool and not very expensive.

So I copy/pasted your regex and your issue is that [,] are special characters in regex, so you need to escape them. So the regex should be : /!@#$^&%*()+=-[\x5B\x5D]\/{}|:<>?,./im

How to Remove Special Characters from String in Java, In this case, CleanInput strips out all nonalphanumeric characters the regular expression pattern so that it strips out any characters that� Use any transliteration library which will produce you string only from Latin characters and then the simple Regexp will do all magic of removing special characters. (This will work for Chinese also and you also will receive side benefits by making Tromsø == Tromso ).

How to: Strip Invalid Characters from a String, Regular Expression to. replace special characters MM/DD/YYYY) � Match anything after the specified � 10-digit phone number with hyphens � all except word� If you want to just remove all special characters, you can use a function like this: SELECT REGEXP_REPLACE (your_column, ' [^0-9A-Za-z]', '')

replace special characters, This post explains how to remove special characters from the string in Apex Example: String strText = 'Welcome - to! % $sale&sforce \\ /code� In Oracle SQL, you have three options for replacing special characters: Using the REPLACE function. Using the REGEXP_REPLACE function. Using the TRANSLATE function. Each of them has their pros and cons. REPLACE allows you to replace a single character in a string, and is probably the simplest of the three methods.

How to remove all special characters from , hi all, i have seen it been done using REGEX but i would like to know how to do it without as mine doesn't appear to be working Thank you. function Remove-StringSpecialCharacter {<# .SYNOPSIS This function will remove the special character from a string. .DESCRIPTION This function will remove the special character from a string. I'm using Unicode Regular Expressions with the following categories \p{L} : any kind of letter from any language.

  • Something like this would be better off as a white-list, not a black-list. then you could just do [a-z]|[0-9]|\s
  • Any script error? Did you debug? Or else put a try...catch block in the javascript code.
  • @ Ape-inago can you please explain RegExp a bit more to me please
  • Please define "special character"! Is "風" special for you? (Thinking about this you'll see @Ape-iango's point.)
  • I don't think anyone here meant any offence. I've got burned before by doing it as a blacklist since there always are those little "gotcha's" that end up getting through (like deceze's examples). Ultimately the correct approach is more about why you are trying to do this.
  • This solution do not work for non English symbols. "Їжак" for example.
  • You can also use uppercase \W instead of ^\w. \W : Matches any non-word character. Equivalent to [^A-Za-z0-9_].…
  • @Seagull I have added an answer which handles Unicodes.
  • to accept accents words, like in portuguese language, do this: stringToReplace.replace(/[^A-zÀ-ú\s]/gi, '')
  • To add most European languages (Norwegian, Sweedish, German, Portoguise, Spanish) stringToReplace.replace(/[^\w\s\xc0-xff]/gi, ''). To include other languages unicode ranges can be used. See:…
  • excellent solution! the accepted answer only works in English, this works on any languages (as far as I checked). thanks :)
  • @knutole remove the ? from the character set portion towards the front. this lists the characters you want to remove, so excluding it from being stripped will inherently include it in the final result.
  • This works great, fits perfectly for any language, just need to add the char that you want replace and that's all. Thanks.
  • Good to know for internationalization, i had no idea JS regex wasn't UTF-8 minded.