How do I escape quotes in preg_match?

Hi everyone, how do I allow the use of single and double quotation marks in the code below?

Thanks

 else if(preg_match('/[^a-zA-Z0-9?! .-]/', $message)){
  echo '<h2>Enter a valid message.</h2>';
 }

Code (markup):

 

Just escape them \'\"

 else if(preg_match('/[^\'\"a-zA-Z0-9?! .-]/', $message)){
  echo '<h2>Enter a valid message.</h2>';
 }

Code (markup):

 

I've tried that but it's not working for some reason

 

Exactly what are you trying to match?

 

Would need to see the full code and an example $message