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Extracting data from a line - php

Posted on 2011-02-11
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Last Modified: 2012-05-11
This lines is from a log file. It logs the http requests it gets for every file it has and produce this log file.  Is there a way to break this file to an array, an assoc array ?

68.68.108.4 - - [04/Jul/2010:20:14:18 +0000] "GET http://cd.dweb.com/hand.jpg HTTP/1.1" 200 4184 "http://sdpics.com/" "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.2 (KHTML, like Gecko) Chrome/6.0.453.1 Safari/534.2"

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ip => 68.68.108.4,
date => 04/Jul/2010:20:14:18
url => http://cd.dweb.com/hand.jpg
browser => Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.2 (KHTML, like Gecko) Chrome/6.0.453.1 Safari/534.2


Thank you
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Question by:sahanz
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6 Comments
 
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Accepted Solution

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Ray Paseur earned 2000 total points
ID: 34878324

<?php // RAY_temp_sahanz.php
error_reporting(E_ALL);
echo "<pre>";

$txt = <<<ENDTEXT
68.68.108.4 - - [04/Jul/2010:20:14:18 +0000] "GET http://cd.dweb.com/hand.jpg HTTP/1.1" 200 4184 "http://sdpics.com/" "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.2 (KHTML, like Gecko) Chrome/6.0.453.1 Safari/534.2"
ENDTEXT;

// WANTED: AN ASSOCIATIVE ARRAY
/*
ip => 68.68.108.4,
date => 04/Jul/2010:20:14:18
url => http://cd.dweb.com/hand.jpg
browser => Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.2 (KHTML, like Gecko) Chrome/6.0.453.1 Safari/534.2
*/

$arr = array();

// IP ADDRESS COMES FIRST, ENDS IN BLANK
$x = explode(' ', $txt);
$arr["ip"] = $x[0];

// DATE IS FOUND INSIDE BRACKETS
$x = explode('[', $txt);
$x = explode(']', $x[1]);
$arr["date"] = $x[0];

// URL IS FOUND AFTER "GET AND BOUNDED BY BLANKS
$x = explode("GET", $txt);
$x = trim($x[1]);
$x = explode(' ', $x);
$arr["url"] = $x[0];

// BROWSER IS THE LAST THING, ENCLOSED IN QUOTES
$x = strrev($txt);
$x = trim($x, '"');
$x = explode('"', $x);
$arr["browser"] = strrev($x[0]);

// SHOW WHAT WE GOT
var_dump($txt);
var_dump($arr);

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Author Comment

by:sahanz
ID: 34878340
whoa, i thought it'd be a regex solution
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LVL 1

Author Closing Comment

by:sahanz
ID: 34878351
Working perfect, next time i'll try to do like this.
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LVL 111

Expert Comment

by:Ray Paseur
ID: 34878433
I often find that it takes longer to debug REGEX solutions than it does to write simpler code.  Nothing wrong with REGEX, but a language made up of nothing but punctuation is very hard to get right.  Going forward, you might want to package this code into a function.  You feed the function a string and it returns the array.  Then in your mainline code, all you would need to write is a single line, something like:

$arr = parse_my_log_text($txt);

Thanks for the points and best of luck with the project, ~Ray
0
 
LVL 1

Author Comment

by:sahanz
ID: 34878447
Yes, I learn new stuff but wasn't able go near regex even if I tried few times, thanks for the tip.
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LVL 111

Expert Comment

by:Ray Paseur
ID: 34878631
Ha!  I know what you mean.  There are entire books devoted to REGEX.
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