php array_unique 显示错误数组到字符串的转换
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array_unique showing error Array to string conversion
提问by user3652109
For getting the unique values i am using unique values. Below is the code i am using
为了获得唯一值，我使用了唯一值。下面是我正在使用的代码
array_unique($results_external);
aasort($results_external,"created_on");
$returns_buy_external[]=array_reverse($results_external, true);
If i use the code like this, below is the error i am getting
如果我使用这样的代码，下面是我得到的错误
A PHP Error was encountered Severity: Notice
Message: Array to string conversion
Filename: models/product_model.php
Line Number: 3550
遇到 PHP 错误 严重性：注意
消息：数组到字符串的转换
文件名：models/product_model.php
行号：3550
3550 line is array_unique($results_external);
3550 行是 array_unique($results_external);
Can anyone help me, why it is getting error like this and how to solve it?
谁能帮助我，为什么会出现这样的错误以及如何解决？
results_external sample format coming is below
results_external 样本格式如下
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
)
)
回答by Niet the Dark Absol
As per the docs, array_uniquecompares 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.
根据docs，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 数组正在被转换为一个字符串数组（所有这些都是"Array"并生成数组到字符串的通知）或者只有一个可以作为唯一返回。
Use the SORT_REGULARflag to compare the elements as they are, but be aware that arrays are only considered equal if they have the same key-value pairs.
使用该SORT_REGULAR标志按原样比较元素，但请注意，仅当数组具有相同的键值对时，数组才被视为相等。
Example:
例子：
print_r(array_unique($array, SORT_REGULAR));
