php面试题集-测试题

测试题

$a = 'hello';$b = &$a;unset($b);$b = 'world';what is $a? // hello

$a = 1;$x = &$a;$b = $a++;what is $b? // 1

var $array = array();$x = empty($array);what is $x? true or false // true

$b = 201;$c = 40;$a = $b>$c ? 4 : 5;what is $a? // 4

$str = 'cd';$$str = 'hotdog';$$str.= 'ok';what is $cd? //hotdogok

$a = count("www.hao123.com");echo $a; what's $a?  // 1