[Resolved] Regular Expressions - evaluating the replacement string

section31

Hey, this is just an example of what I'm trying to accomplish nothing more. I thought the only way to evalute the replacement string as php was to use the E modifier...
While this does work correctly, i'm getting this error for the following code.
Notice: Use of undefined constant TXT - assumed 'TXT' in D:\file.php(4) : regexp code on line 1

<?php
error_reporting(E_ALL);
$file = 'test.TXT';
echo preg_replace("/(.+\.)(txt)/ei","'$1'.strtolower($2)", $file);
//echo preg_replace("/(.+\.)(txt)/i",$1 .  strtolower($2), $file);
?>

Can anyone shed some light on what i'm doing wrong.

paulnaj

Hi, just checking ... have a look at your regex? Has it printed out right in the post ... you sometimes have to hack the backslashes to make them show up.

Should it be ...

/(.+.)(txt)/ei

... instead?

Then, you use \1, \2, etc. to refer to the parens (instead of $1, $2, etc.). EDIT: Just noticed you can actually use $ as well :queasy:

Paul

Weedpacket

You left out quotes in the strtolower() call:

preg_replace("/(.+\.)(txt)/ei", "'$1'.strtolower('$2')", $file)

PHP makes the substitutions and evaluates the result: it doesn't assume that the substituted text is to be treated as a literal string.

section31

Originally posted by Weedpacket
You left out quotes in the strtolower() call:
preg_replace("/(.+\.)(txt)/ei", "'$1'.strtolower('$2')", $file)
PHP makes the substitutions and evaluates the result: it doesn't assume that the substituted text is to be treated as a literal string. [/B]

WTF...hahaha... Geez that was so stupid of me... Thanks...that worked perfectly.

Weedpacket

Originally posted by section31
WTF...hahaha... Geez that was so stupid of me... Thanks...that worked perfectly.

Not to worry: I spotted it because it gets me so often it's one of the first things I look for.

section31

Found another little mistake... Don't forget to put the $ at the end of the match..I almost just left it like that..a huge exploit.

preg_replace("/(.+\.)(txt)$/ei", "'$1'.strtolower('$2')", $file)