Replacing text between text?

[netfrugal]

Is there a function that allows for finding and replacing data between 2 markers inside a file?

example:

Do not replace data here

/////////////////////////// start

Just replace data here

/////////////////////////// end

Do not replace data here

There are some pretty large text files & php files I'd like to just update. But only certain spots.

[nrg_alpha]

Something along these lines?

$replacement = 'Ok, I am the new replacment code you ordered';
$str = <<<DATA
Do not replace data here 

/////////////////////////// start 

Just replace data here 

/////////////////////////// end 

Do not replace data here
DATA;
echo $str . '<br /><br />';
$str = preg_replace('#(/+ start).*?(/+ end)#s', "$1 " . $replacement . " $2", $str);
echo $str;

Output:

Do not replace data here /////////////////////////// start Just replace data here /////////////////////////// end Do not replace data here

Do not replace data here /////////////////////////// start Ok, I am the new replacment code you ordered /////////////////////////// end Do not replace data here