PHP ʖ²ἯTH º󍋼/A Ղ 7. Ѝ ½鉜 PHP ֧³ְ˖֔­ʼ Ѝ¡£ ˄֖±ꁿ Ѝ£º ջЍ£¨integer£© ¸¡µ㐍£¨float£© ʽש£¨array£© ¶ԏ󣨯bject£© ׊Դ£¨resource£© NULL »캍£¨mixed£© ʽז£¨number£© »؀¡£¨callback£© $bool = TRUE; // a boolean $str = "foo"; // a string $int = 12; // an integer echo gettype($bool); // prints out "boolean" echo gettype($str); // prints out "string" // If this is an integer, increment it by four if (is_int($int)) {$int += 4;} // If $bool is a string, print it out // (does not print out anything) if (is_string($bool)) {echo "String: $bool";} º󍋼/A ưµ㼯A עʍ ɏһ¼¶