php去除重复数组值的方法：首先打开相应的PHP代码文件；然后通过“array_unique($ordernum);”去掉重复的字符串；最后输出去重后的数组即可。
本文操作环境：windows7系统、PHP7.1版，DELL G3电脑
php去除数组中重复值,并返回结果!
$data = db('order')->field('ordernum')->where(array('user_id' => $user_id))->select();
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查询的数组格式
array(16) { [0] => array(1) { ["ordernum"] => string(18) "190415165656156213" } [1] => array(1) { ["ordernum"] => string(18) "190415165656156213" } [2] => array(1) { ["ordernum"] => string(18) "190415165656156213" } [3] => array(1) { ["ordernum"] => string(18) "190415170056183687" } [4] => array(1) { ["ordernum"] => string(18) "190415170056183687" } [5] => array(1) { ["ordernum"] => string(18) "190415170056183687" } [6] => array(1) { ["ordernum"] => string(18) "190415170345120966" } [7] => array(1) { ["ordernum"] => string(18) "190415170345120966" } [8] => array(1) { ["ordernum"] => string(18) "190415170345120966" } [9] => array(1) { ["ordernum"] => string(18) "190416174929158053" } [10] => array(1) { ["ordernum"] => string(18) "190416174929158053" } [11] => array(1) { ["ordernum"] => string(18) "190416194457158437" } [12] => array(1) { ["ordernum"] => string(18) "190416194457158437" } [13] => array(1) { ["ordernum"] => string(18) "190416195027154990" } [14] => array(1) { ["ordernum"] => string(18) "190416195027154990" } [15] => array(1) { ["ordernum"] => string(18) "190417124518178758" }}foreach ($data as $k => $v) { $ordernum[] = $v['ordernum'];}
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ordernum数组格式【推荐学习：PHP视频教程】
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array(16) { [0] => string(18) "190415165656156213" [1] => string(18) "190415165656156213" [2] => string(18) "190415165656156213" [3] => string(18) "190415170056183687" [4] => string(18) "190415170056183687" [5] => string(18) "190415170056183687" [6] => string(18) "190415170345120966" [7] => string(18) "190415170345120966" [8] => string(18) "190415170345120966" [9] => string(18) "190416174929158053" [10] => string(18) "190416174929158053" [11] => string(18) "190416194457158437" [12] => string(18) "190416194457158437" [13] => string(18) "190416195027154990" [14] => string(18) "190416195027154990" [15] => string(18) "190417124518178758"}$ordernum = array_unique($ordernum); //去掉重复的字符串
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去重后ordernum 数组格式
array(7) { [0] => string(18) "190415165656156213" [3] => string(18) "190415170056183687" [6] => string(18) "190415170345120966" [9] => string(18) "190416174929158053" [11] => string(18) "190416194457158437" [13] => string(18) "190416195027154990" [15] => string(18) "190417124518178758"}foreach ($ordernum as $k => $v) { $new_ordernum[] = $v; //拆分后的重组}
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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"}
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