| 1 |
rodolico |
1 |
<?php
|
|
|
2 |
|
|
|
3 |
class Logging {
|
|
|
4 |
public $logFileName;
|
|
|
5 |
public $maxLogSize;
|
|
|
6 |
public $truncateLogByPercent;
|
|
|
7 |
|
|
|
8 |
public function __construct( $logFileName = '', $maxLogSize = 0, $truncateLogByPercent = '0.1' ) {
|
|
|
9 |
$this->logFileName = $logFileName;
|
|
|
10 |
$this->maxLogSize = $maxLogSize;
|
|
|
11 |
$this->truncateLogByPercent = $truncateLogByPercent;
|
|
|
12 |
} // function __construct
|
|
|
13 |
|
|
|
14 |
public function log( $string ) {
|
|
|
15 |
if ( $logFileName ) {
|
|
|
16 |
$fh = fopen( $this->logFileName, 'a');
|
|
|
17 |
fwrite($fh, date('Y-m-d H:i:s') . "\t$string\n" );
|
|
|
18 |
fclose($fh);
|
|
|
19 |
}
|
|
|
20 |
if ($this->maxLogSize) { // it is defined, so we must check on the size
|
|
|
21 |
if (sprintf("%u", filesize($this->logFileName)) >= $this->maxLogSize ) // file is too big, remove top $truncateLogByPercent percent
|
|
|
22 |
$this->truncateLog();
|
|
|
23 |
}
|
|
|
24 |
} // function log
|
|
|
25 |
|
|
|
26 |
/*
|
|
|
27 |
Note: this is an initial attempt to build this function.
|
|
|
28 |
First, it is not horribly critical if we don't truncate right at $maxLogSize, so if we don't get a lock, we just blow it off
|
|
|
29 |
Second, we need to remove the first 10% (or whatever) of the file, so we can't use built in's like truncate or anything
|
|
|
30 |
What I do here is read the first 10% (or whatever $truncateLogByPercent is), then do a gets (to get to the end of that line)
|
|
|
31 |
Then, create a temporary file, dump the rest of the log file into it.
|
|
|
32 |
Then, truncate the log file to 0, and dump the temp file back into it.
|
|
|
33 |
|
|
|
34 |
I'm sure there is a much, much better way of doing this, and I would think that having two file handles on the same file would
|
|
|
35 |
do it, but I'm scared of what other file systems would do, so I'll do it this way.
|
|
|
36 |
|
|
|
37 |
NOTE: file_get_contents and file_put_contents would be more efficient, but I can't lock the file that way.
|
|
|
38 |
*/
|
|
|
39 |
private function truncateLog() {
|
|
|
40 |
$fh = fopen( $this->logFileName, 'w');
|
|
|
41 |
if ( flock( $fh, LOCK_EX | LOCK_NB ) ) { // try to get a lock, but don't be too concerned if we can't right now. We can always try next time
|
|
|
42 |
// got the lock, truncate the file from the top :(
|
|
|
43 |
fseek( $fh, $this->maxLogSize * $this->truncateLogByPercent ); // go past the first truncateLogByPercent percent of file
|
|
|
44 |
fgets( $fh ); // go to the end of the line (text only)
|
|
|
45 |
$tmpfh = tmpfile(); // create a temporary file
|
|
|
46 |
while ( fwrite($tmpfh, fread($fh, 1024) ) ) {} // copy the rest of the file to a temp file
|
|
|
47 |
fseek( $fh, 0 ); // move back to the beginning of the log file
|
|
|
48 |
ftruncate( $fh, 0 ); // and empty it
|
|
|
49 |
fseek( $tmpfh, 0); // and the temp file
|
|
|
50 |
while ( fwrite($fh, fread($tmpfh, 1024) ) ) {} // copy the rest of the file to a temp file
|
|
|
51 |
fclose ($fh); // unlocks it at the same time
|
|
|
52 |
fclose ($tmpfh); // removes it from disk also
|
|
|
53 |
}
|
|
|
54 |
}
|
|
|
55 |
|
|
|
56 |
} // class Logging
|
|
|
57 |
|
|
|
58 |
?>
|