preg match php problem!

Posted on 2010-09-09
Last Modified: 2012-05-10
We're trying to do a basic preg match in a file, if the preg match is false, we want to add a line in a file, and then if we re-run the preg match and the line already exists, then just skip that part...

for some reason it ALWAYS goes in the IF statement.... Some help would be appreciated!

we tried preg_match_all, preg_match, strpos, strstr..

string to look for:
exten => h,n,AGI(e911/hangup_check.agi,${UNIQUEID},${LEG_ID},${EPOCH})

string to look for to replace:
exten => h,n,AGI(e911/911cdr.agi,${UNIQUEID})

string to replace if above line is found:
exten => h,n,AGI(e911/hangup_check.agi,${UNIQUEID},${LEG_ID},${EPOCH})
exten => h,n,AGI(e911/911cdr.agi,${UNIQUEID})
$inputSED3 = file_get_contents("/opt/911Gateway/sbc_etc/extensions_911.conf");

if ( preg_match_all("/exten => h,n,AGI(e911\/hangup_check.agi,\${UNIQUEID},\${LEG_ID},\${EPOCH})/", $inputSED3, $matches) === 0 )
  echo "in?";
    $input = preg_replace('/exten => h,n,AGI\(e911\/911cdr\.agi,\${UNIQUEID}\)/', "exten => h,n,AGI(e911/hangup_check.agi,\${UNIQUEID},\${LEG_ID},\${EPOCH})\nexten => h,n,AGI(e911/911cdr.agi,\${UNIQUEID})", $inputSED3);
    file_put_contents("/opt/911Gateway/sbc_etc/extensions_911.conf", $input);

Open in new window

Question by:devteam
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 31

Expert Comment

by:Marco Gasi
ID: 33642303
Try this reg exp

"//(exten => h,n,AGI\(e911\/hangup_check.agi,\$\{UNIQUEID\},\$\{LEG_ID\},\$\{EPOCH\}\))/igm/"

Best regards
LVL 35

Accepted Solution

Terry Woods earned 500 total points
ID: 33642308
There are special characters in the string you're searching for that affect the pattern, and you haven't escaped them all. You can use preg_quote to do the hard work for you. Try this:

$inputSED3 = file_get_contents("/opt/911Gateway/sbc_etc/extensions_911.conf");

$find = 'exten => h,n,AGI(e911/hangup_check.agi,${UNIQUEID},${LEG_ID},${EPOCH})';

if ( preg_match_all("/".preg_quote($find, "/")."/", $inputSED3, $matches) === 0 )
  echo "in?";
    $input = preg_replace('/'.preg_quote('exten => h,n,AGI(e911/911cdr.agi,${UNIQUEID})','/').'/', "exten => h,n,AGI(e911/hangup_check.agi,\${UNIQUEID},\${LEG_ID},\${EPOCH})\nexten => h,n,AGI(e911/911cdr.agi,\${UNIQUEID})", $inputSED3);
    file_put_contents("/opt/911Gateway/sbc_etc/extensions_911.conf", $input);

Open in new window


Author Closing Comment

ID: 33646796
Thank you for the quick response, that works like a charm.. I wasn't aware of this preg_quote!! that's very helpful :)

Featured Post

Secure Your WordPress Site: 5 Essential Approaches

WordPress is the web's most popular CMS, but its dominance also makes it a target for attackers. Our eBook will show you how to:

Prevent costly exploits of core and plugin vulnerabilities
Repel automated attacks
Lock down your dashboard, secure your code, and protect your users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Author Note: Since this E-E article was originally written, years ago, formal testing has come into common use in the world of PHP.  PHPUnit ( and similar technologies have enjoyed wide adoption, making it possib…
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question