[PHP错误异常]①--错误级别

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";
echo mysql_escape_string('\' or 1=1 #');
echo "
";
//Notice级别的错误
echo $king;
echo "
";
$userInfo = array('usernane' => "king", 'age' => 12);
echo $userInfo['username'];
echo "
";
echo $userInfo[age];// undefined constant age
echo '
';

//Warning级别的错误
settype($var, 'int');
var_dump($var);//int 0
echo "
";
settype($var, 'king');//Warning
echo "
";
var_dump($var);//int 0 不改变
echo "
";

//Parse error 语法解析错误
//echo "this is a test"

////Fatal error 不会向下执行
echo md6("king");


echo "程序继续向下执行";
?>

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