zend regex route with negative lookahead -

i'm trying write regex route in zend (1.11) matches urls ending in /foo not if start /bar e.g.

/foo - match /any/words/foo - match  /any/words - no match (doesn't end in /foo) /any/words/barfoo - no match (doesn't end in /foo) /bar/foo - no match (starts /bar) /bar/any/words/foo - no match (starts /bar) 

my regext route looks this:

'^foo$|^(?!/bar/).+/foo$' 

but find matches ending in /foo, if starts /bar.

you need negative lookahead

lucky you, have 1 in pocket. try this:

^(?!/bar).*/foo$ 

see matches in demo.

• the ^ anchor asserts @ beginning of string
• the negative lookahead (?!/bar) asserts follows not /bar
• .* matches characters (dot character except newlines, star repeats 0 or more times)
• /foo matches /foo
• the $ anchor asserts @ end of string

reference

• lookahead , lookbehind zero-length assertions
• mastering lookahead , lookbehind