Re: preg_replace

..oO(kenoli)

Why does the following return an empty value for $string? Shouldn't
it replace the GIF at the end of the string with "gif" and return a
value of "hello.gif"?

<?php

$string = 'hello.GIF';

echo "<br/><br/>Before replacement, \$string = $string";

$old = '*GIF$';
$new = '*gif$';

$string = preg_replace($old, $new, $string);

echo "<br/><br/>After replacement, \$string = $string";

?>

At a minimum, the manual says that it should return the same string if
no match is made.

This code can't work. You should've received a warning:

Warning: preg_replace(): No ending delimiter '*' found [...]

If you want to make the entire filename lower-case, use strtolower().
If you just want to lower-case the extension, try this:

$old = '/GIF$/';
$new = 'gif';

Micha
.

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