function test() {

$arr = file('http://site/test.txt');
$num = mt_rand(1, count($arr));
$content = $arr[$num];
echo $content

$f = 'http://site/test.txt';
$a = preg_split('~[\r\n]{1,2}---[\r\n]{1,2}~', file_get_contents($f));
$content = $a[rand(0,sizeof($a)-1)];
echo $content

function test() {

$arr = file('http://site/test.txt');
$num = mt_rand(1, count($arr));
$content2 = $arr[$num];

$f = 'http://site/test2.txt';
$a = preg_split('~[\r\n]{1,2}---[\r\n]{1,2}~', file_get_contents($f));
$content = $a[rand(0,sizeof($a)-1)];
echo $content, $content2