Hi. Here's one way to do it.
PHP Code:
<?php
$filename = "filename.ext";
$oldtext = "old text";
$newtext = "new text";
if (is_writable($filename)) {
$buffer = implode("", file($filename));
$buffer = str_replace($oldtext, $newtext, $buffer);
$handle = fopen($filename, "wb");
fwrite($handle, $buffer);
fclose($handle);
}
else {
clearstatcache();
echo "Cannot write to ".$filename." - Check permissions.";
}
?>