php去除数组中重复值,并返回结果!_php 数组去重复,下标重置-优快云博客

本文详细介绍了如何从数据库中查询特定用户的订单编号，并通过PHP代码处理查询结果，包括将查询结果转换为数组，去除重复项，以及重新组织数组的过程。

$data = db('order')->field('ordernum')->where(array('user_id' => $user_id))->select();
查询的数组格式
array(16) {
  [0] => array(1) {
    ["ordernum"] => string(18) "190415165656156213"
  }
  [1] => array(1) {
    ["ordernum"] => string(18) "190415165656156213"
  }
  [2] => array(1) {
    ["ordernum"] => string(18) "190415165656156213"
  }
  [3] => array(1) {
    ["ordernum"] => string(18) "190415170056183687"
  }
  [4] => array(1) {
    ["ordernum"] => string(18) "190415170056183687"
  }
  [5] => array(1) {
    ["ordernum"] => string(18) "190415170056183687"
  }
  [6] => array(1) {
    ["ordernum"] => string(18) "190415170345120966"
  }
  [7] => array(1) {
    ["ordernum"] => string(18) "190415170345120966"
  }
  [8] => array(1) {
    ["ordernum"] => string(18) "190415170345120966"
  }
  [9] => array(1) {
    ["ordernum"] => string(18) "190416174929158053"
  }
  [10] => array(1) {
    ["ordernum"] => string(18) "190416174929158053"
  }
  [11] => array(1) {
    ["ordernum"] => string(18) "190416194457158437"
  }
  [12] => array(1) {
    ["ordernum"] => string(18) "190416194457158437"
  }
  [13] => array(1) {
    ["ordernum"] => string(18) "190416195027154990"
  }
  [14] => array(1) {
    ["ordernum"] => string(18) "190416195027154990"
  }
  [15] => array(1) {
    ["ordernum"] => string(18) "190417124518178758"
  }
}

foreach ($data as $k => $v) {
$ordernum[] = $v['ordernum'];
}

ordernum数组格式

array(16) {
  [0] => string(18) "190415165656156213"
  [1] => string(18) "190415165656156213"
  [2] => string(18) "190415165656156213"
  [3] => string(18) "190415170056183687"
  [4] => string(18) "190415170056183687"
  [5] => string(18) "190415170056183687"
  [6] => string(18) "190415170345120966"
  [7] => string(18) "190415170345120966"
  [8] => string(18) "190415170345120966"
  [9] => string(18) "190416174929158053"
  [10] => string(18) "190416174929158053"
  [11] => string(18) "190416194457158437"
  [12] => string(18) "190416194457158437"
  [13] => string(18) "190416195027154990"
  [14] => string(18) "190416195027154990"
  [15] => string(18) "190417124518178758"
}

$ordernum = array_unique($ordernum); //去掉重复的字符串

去重后ordernum 数组格式

array(7) {
  [0] => string(18) "190415165656156213"
  [3] => string(18) "190415170056183687"
  [6] => string(18) "190415170345120966"
  [9] => string(18) "190416174929158053"
  [11] => string(18) "190416194457158437"
  [13] => string(18) "190416195027154990"
  [15] => string(18) "190417124518178758"
}

foreach ($ordernum as $k => $v) {
$new_ordernum[] = $v; //拆分后的重组
}

产生的新数组格式

array(7) {
  [0] => string(18) "190415165656156213"
  [1] => string(18) "190415170056183687"
  [2] => string(18) "190415170345120966"
  [3] => string(18) "190416174929158053"
  [4] => string(18) "190416194457158437"
  [5] => string(18) "190416195027154990"
  [6] => string(18) "190417124518178758"
}