我有两个示例数组：
$array1 = array(
0 => array("a" => '123', "b" => 234),
1 => array("a" => 'abs', "b" => 234),
2 => array("a" => '123', "b" => 234),
3 => array("a" => 'abs', "b" => 234),
4 => array("a" => '123', "b" => 234),
5 => array("a" => 'abs', "b" => 898),
6 => array("a" => '123', "b" => 234),
7 => array("a" => 'abs', "b" => 234),
8 => array("a" => '123', "b" => 234),
9 => array("a" => …