PHP数据流应用的一个简单实例

<?php 
$count = 5; 
start: 
if($count < 5) echo "You can try {$count} time, "; 
echo "Put Password: "; 
$handle = fopen ("php://stdin","r"); 
$line = fgets($handle); 
if(trim($line) != '123456'){ 
$count--; 
if(!$count) goto error; 
goto start; 
} 
goto success; 
error: 
echo "Please try after 1 hour!"; 
goto out; 
success: 
echo "Logined!"; 
out: 
?>

执行结果：