一个 array 参数,怎么样区分是 assoc 还是 list ?

[yakczh]

$arr=array('aa','bb','cc');

$brr=array('1'=>'aa','2'=>'bb');

function test ($param){

}

test($arr);
test($brr);

[foccy]

不知道是什么情况下需要这样的需求。不过这里有答案: http://stackoverflow.com/questions/173400/how-to-check-if-php-array-is-associative-or-sequential

[yakczh]

[B_is_associative] => 0.26401352882385
[B_ais_assoc] => 0.24301218986511
[B_is_assoc] => 0.13501119613647
[B_arrayIsAssociative] => 0.12200903892517
[B_isNumericArray] => 0.12200570106506

isNumericArray 最快