compare two strings

wanaka

Hi,

How can I do a comparison of this two string may vary with different length.

str1="PROBLEM [server] syslog: critical (5)’ for Resource: ‘/storage/events/tapes/SCSI/_tape/10_0_15_0.2.0’ (Threshold: >= ‘3’) "

str2 ="PROBLEM myserver syslog: critical (5)’ for Resource: ‘/storage/events/tapes/SCSI/_tape/9_1_15_0.2.0’ (Threshold: >= ‘4’)

I need to find out "[server]" position from str1 then I need to search str2 from left to right and find the word position of "myserver" based on the position from str1 in this case it should return myserver as the result.

Weedpacket

PHP has a whole pile of string manipulation and comparison functions you can use; typically, once you're clear enough on what exactly you want, it's not too difficult to use those functions to put something together that does it.

wanaka

which function can I use

for example if search PROBLEM myserver syslog:abc

I need to return the word after PROBLEM which is myserver, which function can be used.

wanaka

one example is let say I search the entire string using preg_match function to find the word PROBLEM but I need to retun the word after PROBLEM, in this case "myserver". Is there any function that I can use.

$str="PROBLEM myserver syslog: vmunix: SCSI: Read error -- dev: b 31 0x074700, errno: 126, resid: 2048, (PCS Server)";
if (preg_match("/problem/i", $str)) {
echo "A match was found";
}
else {
echo "A match was not found";
}

BuzzLY

What you need is to tell preg_match "find 'problem,' and return the word after it."

<?php
$string = "PROBLEM myserver syslog: vmunix: SCSI: Read error -- 
dev: b 31 0x074700, errno: 126, resid: 2048, (PCS Server)";
$pattern = "§problem\\s(.*?)\\s§i";
$found = preg_match($pattern,$string,$matches);
if ($found > 0) echo "Found '$matches[1]'";
?>

wanaka

yep I have tried that but it seem to me that if I want find the word after esc_mon, it can't display myserver.esc

<?php
$str="PROBLEM esc_mon myserver.esc: File System Full: /tmp on esc_mon (Newmon for ESC)";
function string_cut($string,$cut_size)
{
$StringArray=explode(" ",$string);
for($i=0;$i<$cut_size;$i++)
{
$string_cut.=" "."$StringArray[$i]";
}
return "$string_cut";
}
$string="";

$str = string_cut($str,3);

if ((preg_match("/esc_mon/i", $str)) == true)
{
// echo "find the esc_mon match";
if ((preg_match("/.esc:/", $str)) == true)
{
$pattern = "§esc_mon\s(.?)\s§i";
$found = preg_match($pattern,$str,$matches);
if($found > 0) $hostname = $matches[1];
echo "$hostname";
}
else
{
$hostname = "esc_mon";
}
}
else {
$pattern = "§problem\s(.?)\s§i";
$found = preg_match($pattern,$str,$matches);
if ($found > 0) $hostname = $matches[1];
echo "$hostname";
}

BuzzLY

Originally posted by wanaka
$pattern = "§esc_mon\s(.*?)\s§i";

Try:

$pattern = "§.esc_mon\s(.?)\s§i";

Incidentally, in case you didn't know, the § character is simply a delimiter. The most common delimiter used is slash (/), but I like to use § because it's not a character I will ever have to look for. And that one in a million time when I DO have to search for it, of course I can delimit it with \§ . Some people have this same philosophy, and use something else, like %. Any character will do, as long as it's not alpha-numeric.

If you like using §, you can enter it easily by Holding ALT and typing 0167 on your number pad (with numlock turned on).

wanaka

Ya I have tried that but it still doesn't return myserver.esc

$str = string_cut($str,3);

if ((preg_match("/esc_mon/i", $str)) == true)
{
if ((preg_match("/.esc:/", $str)) == true)
{
$pattern = "§.esc_mon\s(.?)\s§i";
$found = preg_match($pattern,$str,$matches);
if($found > 0) $hostname = $matches[1];
echo "$hostname";
echo "Get it";
}
else
{
$hostname = "esc_mon";
}
}
else {
$pattern = "§problem\s(.*?)\s§i";
$found = preg_match($pattern,$str,$matches);
if ($found > 0) $hostname = $matches[1];
echo "$hostname";
}