数组处理技巧

SELECT后的结构array (size=4)  0 =>     array (size=1)      'id' => int 32  1 =>     array (size=1)      'id' => int 31  2 =>     array (size=1)      'id' => int 30  3 =>     array (size=1)      'id' => int 27

单个的话

array (size=1)  0 =>     array (size=1)      'id' => int 27

FIND后的结构

array (size=2)  'id' => int 27  'name' => string '上海万达五角场分店' (length=27)

对SELECT集合处理的处理方式

  foreach ($res1 as $k => $v) {
                $res[]=['id'=>$v['id']];
            }
            var_dump( $res);

array (size=4)  0 =>     array (size=1)      'id' => int 32  1 =>     array (size=1)      'id' => int 31  2 =>     array (size=1)      'id' => int 30  3 =>     array (size=1)      'id' => int 27
  foreach ($res1 as $k => $v) {

            $res[]=[$v];

            }
            var_dump( $res);

array (size=4)  0 =>     array (size=1)      0 => int 32  1 =>     array (size=1)      0 => int 31  2 =>     array (size=1)      0 => int 30  3 =>     array (size=1)      0 => int 27

    foreach ($res1 as $k => $v) {

                array_push( $res,$v['id']);
            }
            var_dump( $res);

array (size=4)  0 => int 32  1 => int 31  2 => int 30  3 => int 27


$cus=array_column($res1,'id');
var_dump($cus);
array (size=4)  0 => int 32  1 => int 31  2 => int 30  3 => int 27
注意对SELECT结果有效即使一行,对FIND的结果集无效array (size=1) 0 =>     array (size=1)  'id' => int 27
区别FIND
array (size=1)  'id' => int 27

    foreach ($res1 as $k => $v) {

                array_push( $res,$v);
            }
            var_dump( $res);

  0 =>     array (size=1)      'id' => int 32  1 =>     array (size=1)      'id' => int 31  2 =>     array (size=1)      'id' => int 30  3 =>     array (size=1)      'id' => int 27

  0 => int 32  1 => int 31  2 => int 30  3 => int 27