<?php
 srand((double)microtime()*1000000);
 $bans = "banner/banniere.txt";
 $bans = file($bans);
 $select = rand(0, count($bans) - 1);
 $banner = explode("|", $bans[$select]);
 echo "<a href=\"".trim($banner[1])."\" target=\"_blank\"><img src=\"$banner[0]\" border=0></a>";
?>

$bans = "http://www.mon_site.com/banner/banniere.txt";

<?
$cpt=0;
$fp = fopen("banner/banniere.txt","r");

while (!feof($fp))
{
$enr = fgets ($fp,4096);
$tab[$cpt]=$enr;
$cpt++;
}
srand((double)microtime()*1000000);
$nbr=rand(0,($cpt-1));
echo "$tab[$nbr]";
unset($cpt,$enr,$tab,$nbr);
?>

$fp = fopen("banner/banniere.txt","r");

$fp = fopen("http://www.moy_sayt.com/banner/banniere.txt","r");