Escaping escape Characters

Question

I\'m trying to mimic the json_encode bitmask flags implemented in PHP 5.3.0, here is the string I have:

$s = addslashes(\'O\\\'Rei\"lly\'); // O         


        

Answer 1

The \ generated by addslashes() get re-escaped by json_encode(). You probably meant to say this Doing json_encode($s, JSON_HEX_APOS | JSON_HEX_QUOT) outputs the following but you used $str instead of $s, which confused everyone.

If you evaluate the string "O\\\u0027Rei\\\u0022lly" in JavaScript, you will get "O\'rei\"lly" and I am pretty sure that's not what you want. When you evaluate it, you probably need all the control codes removed. Go ahead, poke this in a file: alert("O\\\u0027Rei\\\u0022lly").

Conclusion: You are escaping the quotes twice, which is most likely not what you need. json_encode already escapes everything that is needed so that any JavaScript parser would return the original data structure. In your case, that is the string you have obtained after the call to addslashes.

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Proof: