Regular expressions in PHP

nobodythere · 06-07-2007 6:42pm #1

Sorry to post without due research but I have to get this done very quickly and regular expressions are difficult

I'm trying to replace a value in a variable that says "$column_x" (where x is a number) with its actual variable called $column_x. There are a bunch of these with different numbers.

So for example:

$column_0 = "hello";
$column_1 = "aloha";

$string = "English: $column_0. Hawaii: $column_1";

So I do:
ereg_replace("\$column_[:digit:]", ......................

but don't know how to finish it. Essentially I'll have to refer back to [:digit:] but have no idea how to do that....

Any takers?

daymobrew · 09-07-2007 1:11pm

Do you need to do the ereg_replace? Assignment like you show will expand the variables (as long as they are inside double quotes).
[PHP]<?php
$column_0 = "hello";
$column_1 = "aloha";

// using double quotes will expand the variables.
$string = "English: $column_0. Hawaii: $column_1";
echo $string;
echo '<br />';
// Now use single quotes so that variables are not expanded.
$string = 'English: $column_0. Hawaii: $column_1';
echo $string, "\n";
?>
[/PHP] This produces:

English: hello. Hawaii: aloha
English: $column_0. Hawaii: $column_1

Regular expressions in PHP

Comments