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 - us.php.net/manual/en/book.regex.php

WhoaItsAFactorial
– WhoaItsAFactorial

2012-07-17 15:40:37 +00:00
Commented Jul 17, 2012 at 15:40 — WhoaItsAFactorial
– WhoaItsAFactorial, Commented Jul 17, 2012 at 15:40
Or sscanf - php.net/manual/en/function.sscanf.php

wquist
– wquist

2012-07-17 15:45:26 +00:00
Commented Jul 17, 2012 at 15:45 — wquist
– wquist, Commented Jul 17, 2012 at 15:45

madfriend · Accepted Answer · 2012-07-17 15:47:43Z

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, 2012 at 15:47

madfriend

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1 Comment

lidongghon Over a year ago

Thank you for the help. I was able to solve the issue with your answer. :)

Chris · Accepted Answer · 2012-07-17 15:45:54Z

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, 2012 at 15:45

Chris

1,1288 silver badges24 bronze badges

1 Comment

lidongghon Over a year ago

Thank you for the help. I was able to solve the issue with your answer. :)

Mike Brant · Accepted Answer · 2012-07-17 15:57:57Z

2

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];

answered Jul 17, 2012 at 15:57

Mike Brant

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1 Comment

lidongghon Over a year ago

Thank you for the help. I was able to solve the issue with your answer. :)

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