标签: array-unique

我有一系列音乐曲目,在这个阵列中,由于在多张专辑中发行,同一首歌可以多次显示.我试图从数组中删除它们,以便只在列表中显示真正的唯一.

哈希看起来像这样:

"tracks" => [
    [0] {
        "id" => 1,
        "Title" => "Intergalactic",
        "ArtistName" => "Beastie Boys"
    },
    [1] {
        "id" => 2,
        "Title" => "Intergalactic",
        "ArtistName" => "Beastie Boys"
    }
]

我需要一种方法来删除基于Title密钥的重复项.无论如何这样做？

我正在检查array_unique函数.手册说它也会对值进行排序.但我无法看到它正在对值进行排序.请参阅我的示例代码.

$input = array("a" => "green", 3=>"red", "b" => "green", 1=>"blue", "red");
print_r($input);
$result = array_unique($input,SORT_STRING);
print_r($result);

The output is

Array
(
    [a] => green
    [3] => red
    [b] => green
    [1] => blue
    [4] => red
)
Array
(
    [a] => green
    [3] => red
    [1] => blue
)

这里数组$ result没有排序.任何帮助表示赞赏.

谢谢Pramod

我的PHP数组有点问题.首先他们在这个数组中有数组,我试图删除重复.我做了一个我的阵列的print_r并打印出来....

Array (
   [0] => Array ( [creditfeeid] => 318 [client] => Test 1 [adjustment] => 444.00 [issuedate] => 2012-02-10 20:27:00 [isrecurring] => No [comment] => 444 [commission] => 17.76 )
   [1] => Array ( [creditfeeid] => 319 [client] => Test 1 [adjustment] => 333.00 [issuedate] => 2012-02-10 20:27:00 [isrecurring] => No [comment] => 333 [commission] => 9.99 )
   [2] => Array ( [creditfeeid] => 320 [client] => Test 1 [adjustment] => 111.00 [issuedate] => 2012-02-10 20:27:00 [isrecurring] => No …

我有这样的数组

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
        )

)

而且我想得到

Array
(
    [0] => Array …

我找到了一些解决方案,但我无法决定使用哪种解决方案.array_unique()在不区分大小写的数组上使用php 函数的最紧凑有效的解决方案是什么？

例:

$input = array('green', 'Green', 'blue', 'yellow', 'blue');
$result = array_unique($input);
print_r($result);

结果:

Array ( [0] => green [1] => Green [2] => blue [3] => yellow )

我们如何删除副本green？至于要删除哪一个,我们假设具有大写字符的重复是正确的.

例如,保持PHP删除php

或保持PHP删除,Php因为PHP有更多的大写字符.

结果将是

Array ( [0] => Green [1] => blue [2] => yellow )

请注意,已保留带大写的绿色.

我正在尝试学习如何使用array_unique,所以我制作了一些示例代码,但我没有得到我的预期.

$array[0] = 1;
$array[1] = 5;
$array[2] = 2;
$array[3] = 6;
$array[4] = 3;
$array[5] = 3;
$array[6] = 7;
$uniques = array_unique($array, SORT_REGULAR);
for($i = 0; $i < count($uniques); $i++)
    echo $uniques[$i];

例如,这给了我''15263'但不是7的输出.经过一些测试后,我认为它停止了它找到第一个副本.这是应该发生的吗？

I've stumbled upon something weird and I don't understand why it works that way.

I have an array of numbers, they are all unique:

$array = [
    98602142989816970,
    98602142989816971,
    98602142989816980,
    98602142989816981,
    98602142989816982,
    98602142989816983,
    98602142989820095,
    98602142989820096,
    98602142989822060,
    98602142989822061,
];
var_dump($array);

array(10) {
  [0]=>
  int(98602142989816970)
  [1]=>
  int(98602142989816971)
  [2]=>
  int(98602142989816980)
  [3]=>
  int(98602142989816981)
  [4]=>
  int(98602142989816982)
  [5]=>
  int(98602142989816983)
  [6]=>
  int(98602142989820095)
  [7]=>
  int(98602142989820096)
  [8]=>
  int(98602142989822060)
  [9]=>
  int(98602142989822061)
}

If I do print_r(array_unique($array)); everything is fine, I get:

Array
(
    [0] => 98602142989816970
    [1] => 98602142989816971
    [2] …

谁能告诉我为什么这不能按预期工作？

<?php
      $merchant_string = '123-Reg|Woolovers|Roxio|Roxio|BandQ|Roxio|Roxio|Big Bathroom Shop|Roxio|Robert Dyas|Roxio|Roxio|PriceMinister UK|Cheap Suites|Kaspersky|Argos|Argos|SuperFit|PriceMinister UK|Roxio|123-Reg';      

      $merchant_array = explode('|', $merchant_string); 

      for($i = 0; $i<count($merchant_array); $i++)
      {
            $merchant_array = array_unique($merchant_array);

            echo $merchant_array[$i] . '<br />';
      }
?>

我得到的结果是:

Woolovers
Roxio

BandQ


Big Bathroom Shop

Robert Dyas

我想要的只是重复:|

你觉得什么更快？

• SELECT DISTINCT(user_id)FROM myTable -fetch-> $ myArray

要么

• SELECT user_id FROM myTable -fetch-> $ myArray然后:$ myArray = array_unique($ myArray)

*user_id是一个外国关键约束*

下面是我的变量,

$string = 'AAA,BBB,aAA,BbB,AAA,BbB';

我需要下面的唯一字符串结果,

$string = 'AAA,BBB,aAA,BbB';

如何使其独特就像array_unique()函数一样,是否有任何默认的String函数来删除PHP中的重复字符串？