Warning: preg_match_all() expects at least 3 parameters, 2 given

[garbagedigger]

I have this reg expression that uses 'ereg' so I tried to update it to use 'preg_match' like below:

 

if (!preg_match("/^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$/", $local_array[$i]))

 

But I was given the following error:

 

Warning: preg_match() [function.preg-match]: Unknown modifier '=' in

 

So I figured I need to tell PHP not to treat those characters otherwise seen as modifiers in the reg. expression by using 'preg_match_all':

 

if (!preg_match_all("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$", $local_array[$i]))

 

But then I was given this error:

 

Warning: preg_match_all() expects at least 3 parameters, 2 given

 

Any Advice?

 

Thanks!

[.josh]

if you are just trying to get a true/false, you need to stick with preg_match.  The problem is that unlike the posix (ereg) functions, the pcre (preg_xxx) functions require a delimiter to be wrapped around the pattern.  It looks like you did do that, using "/".  But since you chose that as your delimiter, you need to escape other instances of it in your pattern.  Otherwise, when the engine gets to it in your pattern, it thinks that's the end of the pattern, and the stuff after the pattern delimiter are where modifiers go (like "i" for case-insensitive matches).  So you have a / in there and it thinks the = after it is a modifier, and that's not a valid modifier.  So long story short, escape instances of the delimiter you chose (you escape it by preceding it with a backslash: \/)

[xyph]

Rather than cluttering up your RegEx with escape characters, use a different delimiter

 

"@^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$@"