JAVAtono - プログラム倉庫

<?php

$sc= $_GET["sc"];

$fp = fopen("ren.txt", "r");
while ($line = fgets($fp)) {
$data=$line;
}
fclose($fp);

print("<START>");
print($data);

$z=$data."<";
$z=$z.$sc;
$z=$z.">";

$gp = fopen("ren.txt", "w+");
fwrite($gp,$z);
fclose($gp);

?>