I have a log file with the following format:

INFO 2011-03-09 10:26:15,270 [user] message

I want to parse the log file using PHP:

// assume file exists and all that
$handle = fopen("log_file.txt", "r");
while ($line_data = fscanf($handle, "%s %s %s [%s] %s\n")) {
    var_dump($line_data);
}
fclose($handle);

When I run this code I get:

[0]=>
 array(5) {
   [0]=> string(4) "INFO"
   [1]=> string(10) "2011-03-09"
   [2]=> string(12) "10:26:15,270"
   [3]=> string(5) "user]"
   [4]=> NULL
}
// snip

It appears the closing bracket in the format string ("%s %s %s [%s] %s") is disrupting the rest of the line from getting parsed. I checked the PHP docs for scanf (as suggested by fscanf), and I didn't see anything mentioning having to escape a left bracket.

Any suggestions on how to get the 4th and 5th elements to look like "user" and "message" respectively?