array_unique显示错误数组到字符串的转换 [英] array_unique showing error Array to string conversion

问题描述

为了获得唯一值，我正在使用唯一值。下面是我正在使用的代码

For getting the unique values i am using unique values. Below is the code i am using

array_unique($results_external);
aasort($results_external,"created_on");
$returns_buy_external[]=array_reverse($results_external, true);

如果我使用这样的代码，以下是我得到的错误

If i use the code like this, below is the error i am getting

遇到PHP错误严重性：注意

A PHP Error was encountered Severity: Notice

消息：数组到字符串的转换

Message: Array to string conversion

文件名：models / product_model.php

Filename: models/product_model.php

行号：3550

3550行是array_unique（$ results_external）;

3550 line is array_unique($results_external);

任何人都可以帮助我，为什么会出现这样的错误以及如何解决它？

Can anyone help me, why it is getting error like this and how to solve it?

results_external样本格式如下

results_external sample format coming is below

Array
(
    [0] => Array
        (
            [id] => 144
            [name] => test
            [slug] => test
            [images] => {"9eebd0f69772dd3bdf8c787864437c85":{"filename":"9eebd0f69772dd3bdf8c787864437c85.png","alt":"TRESemme Smooth and Shine","caption":""}}
            [track_stock] => 1
            [seo_title] => ttt
            [qty] => 0
            [product_type] => 0
            [price] => 0.00
            [saleprice] => 0.00
            [external_links] => http://test.com
            [external_price] => 285.00
            [external_saleprice] => 285.00
            [created_on] => 2013-11-08 15:03:24
        )
)

推荐答案

根据文档， array_unique 默认情况下将元素作为字符串进行比较。这意味着您的2D数组正在被转换为字符串数组（全部为 Array 并生成数组到字符串的通知），或者只能返回一个

As per the docs, array_unique compares elements as strings by default. This means your 2D array is being converted to an array of strings (all being "Array" and generating the array-to-string Notice) or which only one can be returned as unique.

使用 SORT_REGULAR 标志将元素按原样进行比较，但要注意，仅考虑数组如果它们具有相同的键值对，则等于。

Use the SORT_REGULAR flag to compare the elements as they are, but be aware that arrays are only considered equal if they have the same key-value pairs.

示例：

print_r(array_unique($array, SORT_REGULAR));

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