PHP ʖ²ἯTH º󍋼/A Ղ 7. Ѝ ӯ·¨ $foo = True; // assign the value TRUE to $foo // == is an operator which test // equality and returns a boolean if ($action == "show_version") {echo "The version is 1.23";} // this is not necessary... if ($show_separators == TRUE) {echo "hr \n";} // ...because you can simply type if ($show_separators) {echo" hr \n";} µ±ת»»Ϊ boolean ʱ£¬Ҕςֵ±»ȏΪʇ FALSE£º ջЍֵ 0£¨c£© ¸¡µ㐍ֵ 0.0£¨c£© ûӐ³ɔ±±䁿µļA HREF="language.types.array.html" ʽש ûӐµ¥ԪµļA HREF="language.types.object.html" ¶ԏ󼯁 ¾¯¸漯B -1 º͆䋼·ǁ㖵£¨²»›ս¸º£©һѹ£¬±»ȏΪʇ TRUE£¡ echo gettype((bool) ""); // bool(false) echo gettype((bool) 1); // bool(true) echo gettype((bool) -2); // bool(true) echo gettype((bool) "foo"); // bool(true) echo gettype((bool) 2.3e5); // bool(true) echo gettype((bool) array(12)); // bool(true) echo gettype((bool) array()); // bool(false) º󍋼/A ưµ㼯A Ѝ ɏһ¼¶ ջЍ