String slicing / string manipulation in PHP

Question

Total accesses: 296282 - Total Traffic: 1.2 GB
CPU Usage: u757.94 s165.33 cu0 cs0 - 2.56% CPU load
8.22 requests/sec - 33.5 kB/second - 4175 B/request
22 requests currently being processed, 26 idle workers

Let say we have the above as string and we store that string in a variable. Problem: I want to get the VALUE of the following:

requests/sec - CURRENT VALUE IS 8.22
requests currently being processed - CURRENT VALUE IS 22
idle workers - CURRENT VALUE IS 26

Done some solution using strpos and substr but i dont think its a good solution at all because those values above are dynamic it could be 2 digits or 4 digits or longer.

sample code:

$rps = substr($data,strpos($data,"requests/sec")-5,4);
echo $rps; //displays 8.22

Is there another way to do this? I will appreciate any response :)

regex - http://us.php.net/manual/en/book.regex.php – WhoaItsAFactorial Jul 17 '12 at 15:40 — WhoaItsAFactorial, Jul 17 '12 at 15:40
Or `sscanf` - http://php.net/manual/en/function.sscanf.php – wquist Jul 17 '12 at 15:45 — wquist, Jul 17 '12 at 15:45

score 4 · Accepted Answer · answered Jul 17 '12 at 15:47

4

Regular expressions.

$values = array();
preg_match("/(?P<rps>[\d.]+) requests\/sec(.*)(?P<requests>[\d]+) requests (.*)(?P<workers>[\d]+) idle workers/", $your_text, $values);

print 
"requests/sec - CURRENT VALUE IS {$values['rps']}
 requests currently being processed - CURRENT VALUE IS {$values['requests']}
 idle workers - CURRENT VALUE IS {$values['workers']}";

answered Jul 17 '12 at 15:47

madfriend

2,400
1
20
26

Thank you for the help. I was able to solve the issue with your answer. :) – lidongghon Jul 17 '12 at 16:13

score 3 · Answer 2 · answered Jul 17 '12 at 15:45

3

Regular expression would work:

<?php
$data = 'Total accesses: 296282 - Total Traffic: 1.2 GB
CPU Usage: u757.94 s165.33 cu0 cs0 - 2.56% CPU load
8.22 requests/sec - 33.5 kB/second - 4175 B/request
22 requests currently being processed, 26 idle workers';

if( preg_match('/(\d*\.?\d*)\srequests\/sec/', $data, $m) ){
    echo $m[1];
}else{
    echo 'no match';
}

answered Jul 17 '12 at 15:45

Chris

1,118
8
24

Thank you for the help. I was able to solve the issue with your answer. :) – lidongghon Jul 17 '12 at 16:14

score 2 · Answer 3 · answered Jul 17 '12 at 15:57

Assuming all of that output is in string variable $output. You could do this:

// requests per second
$regex = '#^([0-9]*\.?[0-9].*)\040requests/sec#';
preg_match($regex, $output, $matches);
$req_per_sec = $matches[1];

// request being processed
$regex = '/([0-9]*)\040requests\040currently/';
preg_match($regex, $output, $matches);
$req_processed = $matches[1];

// idle workers
$regex = '/\040([0-9]*)\040idle\040workers/';
preg_match($regex, $output, $matches);
$idle_workers = $matches[1];

Thank you for the help. I was able to solve the issue with your answer. :) — lidongghon, Jul 17 '12 at 16:14

String slicing / string manipulation in PHP

3 Answers3