http://chinalover.sinaapp.com/web12/index.php
题意:输入key,key的值需要等于54975581388,但是key的每一位数字不能是1-9
题解:
原理:php的弱类型的特性
<?php
function noother_says_correct($number)
{
$one = ord('1');
$nine = ord('9');
for ($i = 0; $i < strlen($number); $i++)
{
$digit = ord($number{$i});
if ( ($digit >= $one) && ($digit <= $nine) )
{
return false;
}
}
return $number == '54975581388';
}
$flag='*******';
if(noother_says_correct($_GET['key']))
echo $flag;
else
echo 'access denied';
?>
十进制:54975581388
十六进制:0xccccccccc