2 PHP Questions

1. How can I search a textfile for a string and return the whole line?
2. How can I sort by a certin number word (like "this is a test" and I want to sort by second word)

Thanks!

1)

PHP Code:

---

<?php
    $filearr = file("filename.txt");
    $arrlen = count($filearr);
    $tofind = "hello";

    for($i = 0; $i < $arrlen; $i++)
    {
        $pos = strstr($filearr[$i], $tofind);
        if($pos)
        {
            $found = $filearr[$i];
            break;
        }
    }
    echo $found;
?>

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I don't understand what you mean by number two.