Escaping a Javascript string, Unterminated character class error

Question

I keep getting the following error

Uncaught SyntaxError: Invalid regular expression: /$_POST['/: Unterminated character class

I searched a few threads and they all pointed me to the fact the at I am not properly escaping the string. I loaded a php file into a javascript var as a string , then I search through it for the following, but I have tried escaping to no success.

according to List of all characters that should be escaped before put in to RegEx?

These are all the characters that need escaping I believe.

. \ + * ? [ ^ ] $ ( ) { } = ! < > | : -

and here are the code snipets that are failing me. (This is the clean code everything needs escaping)

var n = data.search("$_POST['");
n = res.search("'];");
n = data.search("//hurdle{"); 
n = res.search("}");

If someone could show me how to properly do this, it would be very appreciated. Thank you

How are you attempting to escape these characters? With a \? — Steve Bennett
– Steve Bennett, Commented Jul 29, 2014 at 2:50

zx81 · Accepted Answer · 2014-07-29 02:47:53Z

2

You need to escape the dollar and brackets: \$, \[ and \]

For example:

arrayOfMatches = yourString.match(/\$_POST\['/g);

answered Jul 29, 2014 at 2:47

zx81

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4 Comments

Konstantino Sparakis Over a year ago

How about the ' , and the $? I try escaping those as well but I still get errors.

zx81 Over a year ago

The g is for getting all the matches in one go. That's just one example, there are a number of JS regex methods, e.g. exec. Here is a decent summary

Konstantino Sparakis Over a year ago

Thank you! now I'm running into a range error, haha the love of debugging.

Konstantino Sparakis Over a year ago

edit: I will add the code to the main section in a second I am not sure what it is.

Mritunjay · Accepted Answer · 2014-07-29 02:50:16Z

0

For first expression

data.search(/\$_POST\['/)

answered Jul 29, 2014 at 2:50

Mritunjay

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