获取array_merge和array_unique的php错误

时间:2013-05-08 18:58:20

标签: php codeigniter

以下是数组和我尝试独特/合并的代码

$data['default_new'] = array_unique(array_merge($data['default'], $data['related']))



Array
(
    [0] => Array
        (
            [keywords_id] => 8
            [keyword] => Curling
            [parent_id] => 5
            [count] => 0
        )

)
Array
(
    [0] => Array
        (
            [keywords_id] => 8
            [keyword] => Curling
            [parent_id] => 5
            [count] => 0
        )

    [1] => Array
        (
            [keywords_id] => 10
            [keyword] => Catchers
            [parent_id] => 6
            [count] => 0
        )

    [2] => Array
        (
            [keywords_id] => 16
            [keyword] => CES 2013
            [parent_id] => 3
            [count] => 0
        )

)

它给了我一个字符串错误的数组:

A PHP Error was encountered

Severity: Notice

Message: Array to string conversion

Filename: models/content_model.php

Line Number: 29

我之前遇到过这个独特的问题并且之前合并过并且从未修复过它!

我正在使用codeigniter

这里有关于我正在使用array_unique / merge的函数的更多信息:

    public function results($data, $searched)
    {
        $page['searched'] = $searched;
        $page['is_active'] = $this->logic_model->is_active();
        $data2 = array();
        $data2['default_new'] = array_unique(array_merge($data['default'], 
$data['related']));
}

第29行是$data2['default_new'] = array_u

$data参数包含,defaultregular,可在上面看到。

vardump of data:

array(3) {
  ["active"]=>
  array(2) {
    ["id"]=>
    string(1) "5"
    ["keyword"]=>
    string(6) "Sports"
  }
  ["related"]=>
  array(1) {
    [0]=>
    array(4) {
      ["keywords_id"]=>
      string(1) "8"
      ["keyword"]=>
      string(7) "Curling"
      ["parent_id"]=>
      string(1) "5"
      ["count"]=>
      string(1) "0"
    }
  }
  ["default"]=>
  array(3) {
    [0]=>
    array(4) {
      ["keywords_id"]=>
      string(1) "8"
      ["keyword"]=>
      string(7) "Curling"
      ["parent_id"]=>
      string(1) "5"
      ["count"]=>
      string(1) "0"
    }
    [1]=>
    array(4) {
      ["keywords_id"]=>
      string(2) "10"
      ["keyword"]=>
      string(8) "Catchers"
      ["parent_id"]=>
      string(1) "6"
      ["count"]=>
      string(1) "0"
    }
    [2]=>
    array(4) {
      ["keywords_id"]=>
      string(2) "16"
      ["keyword"]=>
      string(8) "CES 2013"
      ["parent_id"]=>
      string(1) "3"
      ["count"]=>
      string(1) "0"
    }
  }
}

2 个答案:

答案 0 :(得分:1)

错误不是来自array_uniquearray_merge函数调用。

问题在于您之前已将$data定义为string

这应该解决它:

$data = array();
$data['default_new'] = array_unique(array_merge($data['default'], $data['related']))

答案 1 :(得分:1)

请在此处查看“备注”部分:http://us.php.net/array_unique#refsect1-function.array-unique-notes

您需要提出自己的算法来创建一个独特的多维数组。上面链接中的一些评论提出了实现此目的的各种方法,例如this one

<?php
$values = array();

foreach($data as $d) {
    $values[md5(serialize($d))] = $d;
}

sort($values);
?>

关于SO的相关问题:strange behavior of php array_uniqueHow do I use array_unique on an array of arrays?