演算法題。

對象原有屬性值全部是大寫，需求是將對象的屬性值全部轉化成小寫麼。 通常思路是  對象轉化成數組（遍曆轉化成小寫）再轉化成對象  這樣的思路很繁瑣遞迴資料來源且效率低求高效思路或方法stdClass Object(    [INFO] => stdClass Object        (            [A] => 1            [B] => 2            [C] => 3            [C] => 4            [D] => stdClass Object                (                    [AA] => 11                    [BB] => 22                    [CC] => 33                    [CC] => 44                )        ))

回複討論(解決方案)

對象不可能出現同名屬性，請調整一下

對象不可能出現同名屬性，請調整一下

stdClass Object(    [INFO] => stdClass Object        (            [A] => 1            [B] => 2            [C] => 3            [D] => stdClass Object                (                    [AA] => 11                    [BB] => 22                    [CC] => 33                    [CC] => 44                )         ) )

版主有好的思路麼

轉化為數組了過後可以用spl中的數組迭代器來遍曆，不知道速度會不會快一點

不是很明白為什麼要有這樣的需求，可以這樣寫

$s = '{"A":1,"B":2,"C":3,"D":{"AA":11,"BB":22,"CC":33}}';$o = json_decode($s); //類比一個對象$t = serialize($o);$t = preg_replace_callback('/("[A-Z]+")(;.+?;)/', function($r) { return strtolower($r[1]) . $r[2]; }, $t);$o = unserialize($t);print_r($o);

stdClass Object(    [a] => 1    [b] => 2    [c] => 3    [d] => stdClass Object        (            [aa] => 11            [bb] => 22            [cc] => 33        ))

如果真是 json 則可寫作

$s = '{"A":1,"B":2,"C":3,"D":{"AA":11,"BB":22,"CC":33}}';$s = preg_replace_callback('/"[A-Z]+":/', function($r) { return strtolower($r[0]); }, $s);print_r(json_decode($s));

stdClass Object(    [a] => 1    [b] => 2    [c] => 3    [d] => stdClass Object        (            [aa] => 11            [bb] => 22            [cc] => 33        ))

1.先json_encode把對象轉字串
2.使用preg_replace_callback 調用 strtolower把 "*": 轉為小寫，相當於把遍曆改成正則替換。
3.json_decode 把字串轉為對象。

