[RESOLVED] Search a file for emails

[cmdr_bond]

What is the easiest way to search through a file for a pattern? I want a user to upload a text file and then the PHP script will analyze it and search for all the email addresses and output them seperated by a comma.

I tried using strstr() but it only works for the first email and does not continue searching for more emails.

[bradmasterx]

could you not do a while function for e.g.
while(strstr()){
//what ever with found email
}

[bradgrafelman]

[man]preg_match_all/man. If you don't know regular expression syntax, this site has a great tutorial (and, coincidentally, an example for matching e-mail addresses).