Escaping a backslash?

[JAB Creations]

I have seen several attempts at messing with my logs by users putting backslashes at the begining of the UA. I tried the following but I'm not sure how to properly escape in this instance?

elseif ($UA==="\"){header("HTTP/1.0 403");die();}

[dreamcatcher]

stripslashes?

[hk2.php.net...]

or substr?

elseif (substr($UA,0,1)==="\"){header("HTTP/1.0 403");die();}

dc

[JAB Creations]

Well it didn't work and then I checked the reference page...

Returns a string with backslashes stripped off. (\' becomes ' and so on.) Double backslashes (\\) are made into a single backslash (\).

I have it working now! I just added another slash! IoI...