quote , double quote escape

[Barrie Lees]

This is a php query where we are searching for the string 20" (20 inches) in the field named title.
The search string is stored in a php variable
The 20" is escaped, see next line
SELECT * from dbslide WHERE title LIKE "%20\"%"

It produces an SQL syntax error message.

I also tried escaping with the function, mysql_escape_string (after stripslashes)
which produces the next line

SELECT * from dbslide WHERE title LIKE \"%20\"%\"
It also produces an SQL syntax error message.

I can fix it by changing the first and last double quotes to single quotes BUT if I then search for a string containing a single quote I get the same error message.

I can also fix it by typing the inch symbol in TWICE at the form entry eg 20""
SELECT * from dbslide WHERE title LIKE \"%20\"\"%\"
This works.

Is this a bug in Mysql or am I missing something?