php PHP数组唯一值
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PHP Array unique values
提问by MyMomSaysIamSpecial
I have an array like this
我有一个这样的数组
Array
(
[0] => Array
(
[id] => BA
[name] => British Airways
)
[1] => Array
(
[id] => BA
[name] => British Airways
)
[2] => Array
(
[id] => LA
[name] => Lanchile
)
[3] => Array
(
[id] => LA
[name] => Lanchile
)
[4] => Array
(
[id] => BA
[name] => British Airways
)
[5] => Array
(
[id] => BA
[name] => British Airways
)
)
and i want to get
我想得到
Array
(
[0] => Array
(
[id] => BA
[name] => British Airways
)
[1] => Array
(
[id] => LA
[name] => Lanchile
)
)
but after using array_unique function, all i have is
但是在使用 array_unique 函数之后，我所拥有的就是
Array
(
[0] => Array
(
[id] => BA
[name] => British Airways
)
)
what am i doing wrong?
我究竟做错了什么？
回答by diegoperini
array_unique(my_array, SORT_REGULAR)
As requested in comments. :)
正如评论中所要求的那样。:)
回答by fullybaked
As mentioned array_unique doesn't support multi dimensional arrays, but you could iterate over the data and build your own
如前所述，array_unique 不支持多维数组，但您可以遍历数据并构建自己的
<?php
$airlines = array(
array('id' => 'BA', 'name' => 'British Airways'),
array('id' => 'LA', 'name' => 'Lanchile'),
array('id' => 'BA', 'name' => 'British Airways'),
array('id' => 'LA', 'name' => 'Lanchile'),
array('id' => 'BA', 'name' => 'British Airways'),
array('id' => 'LA', 'name' => 'Lanchile'),
);
$tmp = array();
foreach ($airlines as $item) {
if (!in_array($item['id'], $tmp)) {
$unique[] = $item;
$tmp[] = $item['id'];
}
}
var_dump($unique); // $unqiue will have your desired results in it var_dump was just for testing
回答by Shijin TR
array_unique is not intended to work on multi dimensional arrays.
You need to loop the array
你需要循环数组
回答by Mark Baker
$airlines = array(
array('id' => 'BA', 'name' => 'British Airways'),
array('id' => 'LA', 'name' => 'Lanchile'),
array('id' => 'BA', 'name' => 'British Airways'),
array('id' => 'LA', 'name' => 'Lanchile'),
array('id' => 'BA', 'name' => 'British Airways'),
array('id' => 'LA', 'name' => 'Lanchile'),
);
$unique = array_map(
'unserialize',
array_unique(
array_map(
'serialize',
$airlines
)
)
);
var_dump($unique);
