quotemeta

Returns a version of str with a backslash character (\) before every character that is among these:

The input string.

Returns the string with meta characters quoted, or FALSE if an empty string is given as str.

addslashes() -

addcslashes() -

htmlentities() -

htmlspecialchars() -

nl2br() -

stripslashes() -

stripcslashes() -

ereg() -

preg_quote() -