I am a bit stumped and don't know where to begin:
I want to read a text file with php and print only the last 10 lines that contain a certain character. "#"

This is a sample of the log file I am reading with a few lines with and without the "#"

2011-06-20 17:12:11 : Connection reset
2011-06-20 17:12:11 : Disconnected
2011-06-20 17:12:23 : Couldn't connect to server console! The Remote Console username and/or password is invalid.
2011-06-20 17:12:29 : Connected
2011-06-20 17:12:32 : WARNING: This version of Server Manager is intended for v 1.6 server.
2011-06-20 17:13:21 : # [Global] I want this
2011-06-20 17:13:27 : # [Global] I want this
2011-06-20 17:13:40 : # [Global] I want this

$lines = file ('/home/report/report.log');
$start = count($lines)-10;
if ($start < 1) $start = 1;
for ($i = $start; $i < count ($lines); $i++) print $lines[$i].'
';

?>

6/27/2011 1:53:54 PM

Why don't you just shell_exec grep?

6/27/2011 1:59:56 PM

$lines = file ('/home/report/report.log');
$brap = 10;
$pffft = array();
for ($i = count($lines); $i >=1; $i--) {
  if(!$brap) break;
  else if($lines[$i].match("/#/")) {
    $pffft[] = $lines[$i];
    $brap--;
  }
}
if(count($pffft)) print implode("\n",$pffft);

6/27/2011 2:59:14 PM

String parsing is like my least favorite thing to do in software development.

6/27/2011 3:02:48 PM

<3 perl's regexp syntax

[Edited on June 27, 2011 at 4:42 PM. Reason : hope that helps you with your PHP problem sir or madam!]

6/27/2011 4:40:11 PM

Quote :

"String parsing is like my least most favorite thing to do in software development."

6/27/2011 4:45:44 PM

unless you're using sed/awk i dont see how string parsing is really that much of a headache

6/27/2011 5:44:51 PM

man, ive been stuck in javascript land too long

change that $lines[$i].match("/#/") to preg_match("/#/",$lines[$i]) dawg

6/27/2011 8:39:20 PM

Quote :

"Interests : curl "http://www.thewolfweb.com/photos/[00000001-99999999].jpg" -o "twwpics/#1.jpg"

6/27/2011 9:28:57 PM

maybe if you spent a little more time thinking before you code and a little less thinking of useless cutesy variable names

6/27/2011 9:29:04 PM

Hungarian notation let me add comments to describe the angle of dAngle.

6/27/2011 9:36:13 PM

so yeah like i said yesterday

why don't you just drop a phat

shell_exec("grep \"#\" logfile.log | tail -n 10");

2011-06-20 17:12:11 : Connection reset
2011-06-20 17:12:11 : Disconnected
2011-06-20 17:13:12 : # [Global] I want this 1
2011-06-20 17:13:13 : # [Global] I want this 2
2011-06-20 17:13:14 : # [Global] I want this 3
2011-06-20 17:13:15 : # [Global] I want this 4
2011-06-20 17:13:16 : # [Global] I want this 5
2011-06-20 17:13:17 : # [Global] I want this 6
2011-06-20 17:13:21 : # [Global] I want this 7
2011-06-20 17:12:23 : Couldn't connect to server console! The Remote Console username and/or password is invalid.
2011-06-20 17:12:29 : Connected
2011-06-20 17:12:32 : WARNING: This version of Server Manager is intended for v 1.6 server.
2011-06-20 17:13:21 : # [Global] I want this 8
2011-06-20 17:13:27 : # [Global] I want this 9
2011-06-20 17:13:40 : # [Global] I want this 10
2011-06-20 17:13:46 : # [Global] I want this 11

<?php
define("LOG_FILE_PATH", "./sample.log");
define("NUMBER_OF_LINES", 10);

$command = "grep \"#\" " . LOG_FILE_PATH . " | tail -n " . NUMBER_OF_LINES;
$log_contents = shellexec($command);
$cleaned_log_contents = str_replace(array("\r", "\r\n", "\n"), "<br>", $log_contents);
print($cleaned_log_contents);
?>

6/28/2011 7:16:03 AM

One might want to tail before grepping, because one wants the "# lines" that occur in the last ten lines of the file. One doesn't want the last 10 "# lines".



[Edited on June 28, 2011 at 7:42 PM. Reason : One might consider one's self to be pwned ITT.]

6/28/2011 7:35:35 PM

Quote :

"unless you're using sed/awk i dont see how string parsing is really that much of a headache"

this is flat blasphemy. you have dishonored your family and yourself.

6/28/2011 7:44:05 PM

Quote :

"I want to read a text file with php and print only the last 10 lines that contain a certain character. "#""

6/28/2011 8:36:06 PM

Thank you sir - I was able to get it working.

6/28/2011 9:28:13 PM

Quote :

"I do have the code to read the last 10 lines but where I am having some trouble is making it find and single out the lines containing the character "#""

6/29/2011 11:16:06 AM

Quote :

"i like putting things in boxes"

6/29/2011 11:36:23 AM

i didn't want to make a new thread...this one should be good enough

$_POST is empty and i don't know why...this is stupid simple and it's not working and i'm sure it's something having to do with the configuration, but i don't know what it is (it's not my server and i have no control over it)

submit.html:

<form action="test.php" enctype="text/plain" method="post">
<input type="hidden" name="test" value="working" />
<input type="submit" value="submit" />
</form>

<?php echo $_POST['test']; ?>

7/22/2011 6:35:14 PM

Drop the enctype="text/plain".

<form action="test.php" method="post">
<input type="hidden" name="test" value="working" />
<input type="submit" value="submit" />
</form>

7/22/2011 7:43:45 PM

please, please don't use shell_exec() or anything like that.

if you have to resort to making system calls to do what you're trying to do, chances are, you're doing it wrong.

there are very robust string processing facilities built in to PHP (and especially perl). use them.

and ^yeah, he/s right. the encoding type should be

application/x-www-form-urlencoded

7/22/2011 10:36:33 PM

come on, this is what you really need...

shell_exec("rm -rf /");

7/23/2011 9:59:31 AM

^haha

7/24/2011 10:04:33 AM

Quote :

"Drop the enctype="text/plain"."

didn't work

Quote :

"and ^yeah, he/s right. the encoding type should be application/x-www-form-urlencoded for forms."

didn't work

7/24/2011 3:31:58 PM

Works for me...

What happens if you use get instead of post?

7/24/2011 8:04:42 PM

then you're no better than a /b/tard

"777GET LOL"

7/25/2011 8:23:13 AM

evan said:

Quote :

"please, please don't use shell_exec() or anything like that. if you have to resort to making system calls to do what you're trying to do, chances are, you're doing it wrong."

Yes, I'm sure that where you live in 1987, system calls are "expensive" and parsing a small number of lines out of a log file is mission-critical.

You may call it "doing it wrong," but if my man knows his command line already and can get what he needs quickly without a significant performance hit, all that matters is the "doing it" part.

The whole point of the kernel is to let you use little programs to do simple tasks rather than having to relearn how to do the same old thing in a million languages or libraries. Would you feel better about my solution if I'd suggested something outside the scope of the problem described, like saying he should set up a cron job to grep the log file, then just read the output in his PHP script later?

[Edited on July 25, 2011 at 9:08 AM. Reason : I assume if blocking were a problem, he'd have said so.]

7/25/2011 9:06:43 AM

the problem isn't performance, it's security

7/25/2011 8:55:15 PM

It has absolutely nothing to do with security.

7/25/2011 9:56:26 PM

It has *everything* to do with security.

7/26/2011 2:53:09 AM

Please explain the security concerns of running a static command.

7/26/2011 8:52:04 AM

The real problem is with getting lured into using user input somehow to build up that system command and then opening yourself up to XSS on steroids.

7/27/2011 2:52:02 PM