array(5) {
[0]=>
array(2) {
["idx"]=>
string(5) "20508"
["code_name"]=>
string(1) "a"
}
[1]=>
array(2) {
["idx"]=>
string(5) "20509"
["code_name"]=>
string(1) "a"
}
[2]=>
array(2) {
["idx"]=>
string(5) "20510"
["code_name"]=>
string(1) "a"
}
[3]=>
array(2) {
["idx"]=>
string(5) "20526"
["code_name"]=>
string(1) "b"
}
[4]=>
array(2) {
["idx"]=>
string(5) "20527"
["code_name"]=>
string(1) "b"
}
}
$code_name 需要去重的数组
//去重
$name = [];
foreach($code_name as &$v){
if(in_array($v['code_name'],$name)){
unset($v);
}else{
$name[] = $v['code_name'];
}
}
unset($v);
$code_name = $name;