100分PHP数组合并

我定义了一对json数据 键值对的方式 K 代表Key V代表Values
values带有\r\n（换行符）
也就是说我想将两个PHP数组进行合并，将K和Value完全相同就忽略一个，如果K相同，V不同，就将V进行合并，值的合并方式也是，同slpit得到数组，然后取一个交集
[
{'K':'k111111','V':'v11111\r\nV11112\r\nV11113'},
{'K':'k22222','V':'v22222'},
{'K':'k33333,'V':'v33333'},
{'K':'k44444','V':'v44443\r\nv44444'}
]
PHP json_decode 函数之后得到数组
第二个json
[
{'K':'k111111','V':'v11111'},
{'K':'k33333,'V':'v33333'},
{'K':'k44444','V':'v44444\r\nv44445\r\nv44446'},
{'K':'k55555','V':'v55555'}
]
得到的结果：
[
{'K':'k111111','V':'v11111\r\nV11112\r\nV11113'},
{'K':'k22222','V':'v22222'},
{'K':'k33333,'V':'v33333'},
{'K':'k44444','V':'v44443\r\nv44444\r\nv44445\r\nv44446'},
{'K':'k55555','V':'v55555'}
]
也就是说K
请问 各位大神们，如何实现

回复讨论(解决方案)

错了 不取交集，取数量多的那个

没人 来人啊 大神们啊

$a =  
[{"K":"k111111","V":"v11111\r\nV11112\r\nV11113"},{"K":"k22222","V":"v22222"},{"K":"k33333","V":"v33333"},{"K":"k44444","V":"v44443\r\nv44444\r\nv44445\r\nv44446"},{"K":"k55555","V":"v55555"}]