array_column()函数常用汇总函数：返回输入数组中单个列的值。语法：array_column(array,column_key,index_key);$users=[['id'=>100,'name'=>'hisheng','age'=>20,],['id'=>101,'name'=>'xiao','age'=>21,],['id'=>102,'name'=>'zhang','age'=>22,]]一个。array_column($users,'name')//返回结果name['hisheng','xiao','zhang',]2.array_column($users,'age')//返回结果age[20,21,22]3.array_column($users,'name','id')//返回结果id作为列的索引，name为值[100=>'hisheng',101=>'xiao',102=>'zhang',]4.array_column($users,'age','name')//返回结果id作为该列的索引，age为值['hisheng'=>20,'xiao'=>21,'zhang'=>22,]五。array_column($users,null,'id')//返回结果//当第二个参数为null时，返回整个数组[100=>['id'=>100,'name'=>'hisheng','age'=>20,],101=>['id'=>101,'name'=>'xiao','age'=>21,],102=>['id'=>102,'name'=>'zhang','age'=>22,]]感谢观看，欢迎关注我的公众号
