php怎麼去除重複數組值

php去除重複陣列值的方法：先開啟對應的PHP程式碼檔案；然後透過「array_unique($ordernum);」去掉重複的字串；最後輸出去重後的陣列即可。

本文操作環境：windows7系統、PHP7.1版，DELL G3電腦

php移除陣列中重複值,並傳回結果!

$data = db('order')->field('ordernum')->where(array('user_id' => $user_id))->select();

查詢的陣列格式

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陣列格式【推薦學習：PHP影片教學】

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

去重後ordernum 陣列格式

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
}

產生的新數組格式

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"
}

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