Escapes the special characters used for regular expressions
in string, for instance "a.b*c" becomes "a\.b\*c". This
function is useful to dynamically generate regular expressions.
string can contain nul characters that are replaced with "\0",
in this case remember to specify the correct length of string
in length.
Since 2.14
Escapes the special characters used for regular expressions in string, for instance "a.b*c" becomes "a\.b\*c". This function is useful to dynamically generate regular expressions. string can contain nul characters that are replaced with "\0", in this case remember to specify the correct length of string in length. Since 2.14