find php shorttags with ack

#!/bin/sh
# find <? with any whitespace
ack -o --nogroup --break --php "<\?\s" *

# find <?}
ack -o --nogroup --break --php "<\?}" *

# find <?echo
ack -o --nogroup --break --php "<\?echo" *

# find all three above in one command
ack -o --nogroup --break --php "(<\?\s)|(<\?})|(<\?echo)" *

# find all <? tags that are followed by whitespace or <? and not followed by php or = or x
ack -o --nogroup --break --php "(<\?\s)|(<\?})|(<\?echo)|(<\?[^p=x])" *


# a better regex that gets them all:
ack -o --nogroup --break --php '<\?(?!php|=|x)' *