PHP手册学习

<?php
$_bool = true;
echo gettype($_bool);
$_string = (string)$_bool;


echo "<BR><BR>";
echo gettype($_string);


echo "<BR><BR>";
echo (int) ( (0.1+0.7) * 10 ); 

//定界符
echo "<BR><BR>";
$str = <<<END
大家好, 定界符出来了,
谢谢!妈的你好意思,现在才看这块!
END;
class foo
{
    var $foo;
    var $bar;

    function foo()
    {
        $this->foo = 'Foo';
        $this->bar = array('Bar1', 'Bar2', 'Bar3');
    }
}

$foo = new foo();
$name = 'MyName';
echo <<<END
fooclass Name ".$name.", is bar:".{$foo->bar[1]};
END;

echo "<BR><BR>";
$a="Hello A";
$b="a";
echo "This is a {${$b}}"; //理解正确,操蛋现在才看这些

echo "<BR><BR>";
echo $a{0};

echo "<BR><BR>";
$_foo = array(1=>"xxdxxd", 2=>"xxdxxd2");
settype($_foo, "object");
var_dump($_foo);
//object(stdClass)#1 (2) { [1]=> string(6) "xxdxxd" [2]=> string(7) "xxdxxd2" } 



echo "<BR><BR>";
echo  get_class($foo)."<BR>";
echo get_parent_class($foo)."<BR>";
$subclass = is_subclass_of($foo, "base");
var_dump($subclass);
//echo $foo->1;
//$stdClass->1;


echo "<BR><BR>";
//get_resource_type
$c = mysql_connect("localhost", "root","");
echo get_resource_type($c)."<BR>";
$fp = fopen("foo", "w");
echo get_resource_type($fp)."<BR>";
//$doc = new_xmldoc("1.0");



?>