array(6) {
[0]=>
array(6) {
["id"]=>
string(1) "1"
["teacher_name"]=>
string(9) "毕向东"
["teacher_intro"]=>
string(48) "从事软件开发以及软件教育培训多年"
["teacher_from"]=>
string(18) "传智播客讲师"
["teacher_pic"]=>
string(31) "__PUBLIC__/images/毕向东.jpg"
["Video"]=>
array(9) {
[0]=>
array(1) {
["video_zan"]=>
string(1) "2"
}
[1]=>
array(1) {
["video_zan"]=>
string(1) "0"
}
[2]=>
array(1) {
["video_zan"]=>
string(1) "0"
}
[3]=>
array(1) {
["video_zan"]=>
string(2) "40"
}
[4]=>
array(1) {
["video_zan"]=>
string(2) "36"
}
[5]=>
array(1) {
["video_zan"]=>
string(1) "0"
}
[6]=>
array(1) {
["video_zan"]=>
string(1) "0"
}
[7]=>
array(1) {
["video_zan"]=>
string(1) "0"
}
[8]=>
array(1) {
["video_zan"]=>
string(1) "0"
}
}
}怎么将video_zan求个和，用遍历求和吗？