不知道错哪了，快崩溃了

不知道哪里错了，快崩溃了
$data1=stripslashes($data1);
$aar=strncasecmp($data1,"select",6);
$arr1=strncasecmp($data1,"insert",6);
if((arr!=0)&&(arr1!=0))
{
echo "$arr";
echo "
";
echo "
";
echo "$data1";
echo "$arr1";
echo "
";

exit( "false to run sqlcript");


}

------解决方案--------------------

if(($aar!=0)&&($arr1!=0))
{
echo $aar;

名字你看叉了