$result = [ 'a'=>[1,2], 'b'=>[1,2], 'c'=>[1,2], 'd'=>[1,2], ] array_intersect_ukey( $result['a'], $result['b'], $result['c'], $result['d'], 'test' );
现在的问题是,我不知道$result里面有多少数组,有可能a-d,有可能只有a和d。
那array_intersect_ukey函数也要动态根据此动态的传入参数。
比如只有a和d
array_intersect_ukey( $result['a'], $result['d'], 'test' );
比如只有a,c和d
array_intersect_ukey( $result['a'], $result['c'], $result['d'], 'test' );
要如何实现这种动态传入参数呢?或者有没有其他的实现方法?
回复内容:
$result = [ 'a'=>[1,2], 'b'=>[1,2], 'c'=>[1,2], 'd'=>[1,2], ] array_intersect_ukey( $result['a'], $result['b'], $result['c'], $result['d'], 'test' );
现在的问题是,我不知道$result里面有多少数组,有可能a-d,有可能只有a和d。
那array_intersect_ukey函数也要动态根据此动态的传入参数。
比如只有a和d
array_intersect_ukey( $result['a'], $result['d'], 'test' );
比如只有a,c和d
array_intersect_ukey( $result['a'], $result['c'], $result['d'], 'test' );
要如何实现这种动态传入参数呢?或者有没有其他的实现方法?
我没怎么细看楼主的问题,不过我告诉楼主两个点,我敢肯定是能解决楼主所描述的问题:
1.留意一个叫做call_user_func_array()的函数
http://php.net/manual/zh/function.call-user-func-array.php
2.这个可能不如1重要,但是还要提一下吧:
func_num_args(); //输出参数个数
func_get_args; //获取参数,返回参数数组
3.既然参数个数以及名称不确定,那么,可以通过1中函数向某个函数传参,记得参数用数组方式,数组可以让你传各种各样的参数
楼主的问题,应该可以的到解决.
回来又仔细看了一下楼主的问题,没错,call_user_func_array可以是帮助你。
可以递归或循环调用。
根据A ∩ B ∩ C = ( A ∩ B ) ∩ C
,第一次计算头两个数组的交集,然再用第一次计算的结果和第三个数组(如果有的话)计算交集,以此类推。
我以前问过类似的问题 https://segmentfault.com/q/1010000004290664

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