preg_match question, how to do this?

Say I have the following:

$var = "127.0.0.1 (127.0.0.1) 56(84) b开发者_高级运维ytes of data. 64 bytes from 127.0.0.1: icmp_seq=1 ttl=57 time=19.5 ms --- 127.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 19.548/19.548/19.548/0.000 ms ";

How can I return so it just says

$var2 = "19.5";

So it basically grabs whats in this part: time=19.5 ms ---

Thank you

EDIT

I think I have figured it out myself:

$var = "127.0.0.1 (127.0.0.1) 56(84) bytes of data. 64 bytes from 127.0.0.1: icmp_seq=1 ttl=57 time=19.5 ms --- 127.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 19.548/19.548/19.548/0.000 ms";

$var2 = preg_match("/time=(.*) ms ---/", $var, $matches);
print_r($matches[1]);

I don't know if this is the right way to do it, but it seems to work?

Try this:

$var = "127.0.0.1 (127.0.0.1) 56(84) bytes of data. 64 bytes from 127.0.0.1: icmp_seq=1 ttl=57 time=19.5 ms --- 127.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 19.548/19.548/19.548/0.000 ms ";
if(preg_match('/time=(\d+\.\d+)/', $var, $match)) {
  $var2 = $match[1];
  echo $var2;
}

which will echo:

19.5

$match[1] will contain the entire match (time=19.5), in your case, and $match[1] contains match group 1 from the pattern: which is the number 19.5.

This could do it with preg_match:

if (preg_match("/time=(.*?) ms/", $line, $m)) {
  $time = (float) $m[1];
}

Or with explode:

$fields = explode("=", $line);
$time = (float) $fields[4];

You could retrieve this with the following pattern:

preg_match('/time=([^ ]+) /',$matches);
echo $matches[1]; // 19.5

Matches after time= at least one character (+) that isn't a space ([^ ]).

preg_match("/time=([\d.]+).ms/",$var,$matches);
//var_dump($matches)
//$match[1] now holds the 19.5
?>

Enjoy

Use this regex in your preg_match call

time=([\d\.]+)

<?php

$var="127.0.0.1 (127.0.0.1) 56(84) bytes of data. 64 bytes from 127.0.0.1: icmp_seq=1 ttl=57 time=19.5 ms --- 127.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 19.548/19.548/19.548/0.000 ms ";

preg_match("/time=([0-9.]+)/", $var, $matches);

$var2 = $matches[1];

echo $var2;

?>

Edit: Or you can edit the regex to:

preg_match("/time\s*=\s*([0-9.]+)/", $var, $matches);

So that it matches "time=xx.x" or "time = xx.x".