php 例如:数组A ={['1001','A'],['1002','B'],['1003','C']}数组B ={['1001','A','01'],['1002','B','02'],['1003','C','03'],['1001','A','04']} 想得到的结果是:数组C={['1001','A','01,04'],['1002','B','02'],['1002','B','03']}