一个超简单的php 许可系统代码
<?php
$fp = fopen("http://domain.com/lic.txt", "r");
stream_set_timeout($fp, 10);
$license = fread($fp, filesize($filename));
fclose($fp);
if ($license == "1234567") {
echo "Your license key is valid";
} else {
die("Invalid license key");
}
?>
