[thelist] injection attacks on php contact form

[Jay Blanchard]

[snip]
My questions: does this seem adequate? Are there any known attack 
methods that would be likely to get through these checks? Is it 
overkill? Might some legitimate inquiries be lost through the security 
measures?
[/snip]

I recommend that you go to http://www.shiflett.org and read the many fine
articles on preventing injection as well as a truckload of information on
security and PHP.