Solved

How to rewrite ereg to preg_match

Posted on 2013-01-01
3
405 Views
Last Modified: 2013-01-01
Hi,
I'm trying to figure out how to change the below code so it doesn't use ereg as I'm getting a deprecated error and I believe I should be using preg_match. I simply dropped in preg_match and not surprisingly, it failed with this error:
Warning: preg_match(): No ending delimiter '^'

What I'm trying to accomplish it to tell if the '$fromcaller' variable is an ip number or not and if so, 'do this' or else 'do that'. If there is a better/cleaner way of doing it, I'm all ears.

This is the snippet I'm using:
if (ereg("^([0-9]{1,3})x2E([0-9]{1,3})x2E([0-9]{1,3})x2E([0-9]{1,3})$", $fromcaller, $digit)) {
if (($digit[1] <= 255) && ($digit[2] <= 255) && ($digit[3] <= 255) && ($digit[4] <= 255)) {

Open in new window

0
Comment
Question by:tjyoung
  • 2
3 Comments
 
LVL 110

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 38734452
Preg expressions need a "regex delimiter" and it's often as simple as adding the delimiter.

$rgx 
= '#'  // DELIMITER
. "^([0-9]{1,3})x2E([0-9]{1,3})x2E([0-9]{1,3})x2E([0-9]{1,3})$"
. '#' // DELIMITER
;

Open in new window

Try this and see... ~Ray
0
 
LVL 1

Author Closing Comment

by:tjyoung
ID: 38734568
Thanks that was it!
Have a great 2013 Ray.
0
 
LVL 110

Expert Comment

by:Ray Paseur
ID: 38734570
Thanks for the points, and a great New Year to you, too!

If you find that you have eregi() in your code, that is the case-insensitive version of the regular expression.  In that case, you can add the letter i after the last regex delimiter and the preg engine will become case-insensitive.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

I imagine that there are some, like me, who require a way of getting currency exchange rates for implementation in web project from time to time, so I thought I would share a solution that I have developed for this purpose. It turns out that Yaho…
This article discusses four methods for overlaying images in a container on a web page
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…

713 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