PHP：如何识别和数组中的更改，重复值？ [英] PHP: How to identify AND CHANGE duplicate values in an array?

问题描述

OK，有很多的重复检测和PHP数组拆除的例子，使用array_unique（）等，但如果你想找到DUP的内容，修改它们，在一个循环中再次检查，直到所有的DUP现在唯一<？ / p>

我觉得它像使用array_filter（）...所以作为一个更具体的例子，这里是会来的sql语句是这样的：

  SELECT标识，list.comboname
FROM列表
   内部联接 （
      SELECT comboname
      FROM列表
       GROUP BY comboname
       HAVING计数（ID）＆GT; 1
   ）DUP ON list.comboname = dup.comboname
 

要重复的表中的一个数组：

 阵列（
    [0] =＆GT; 49
    [1] =＆GT; big.dup
    [2] =＆GT; 233
    [3] =＆GT; another.duplicate
    [4] =＆GT; 653
    [5] =＆GT; big.dup
    [6] =＆GT; 387
    [7] =＆GT; big.dup
    [8] =＆GT; 729
    [9] =＆GT; another.duplicate
    [10] =＆GT; 1022
    [11] =＆GT; big.dup
）
 

现在我要的是一些PHP删除字符直到周期，使他们独特的[或在必要的末尾添加数字]

所以，结果将是：

 阵列（
    [0] =＆GT; 49
    [1] =＆GT; big.dup
    [2] =＆GT; 233
    [3] =＆GT; another.duplicate
    [4] =＆GT; 653
    [5] =＆GT; big.du
    [6] =＆GT; 387
    [7] =＆GT; big.d
    [8] =＆GT; 729
    [9] =＆GT; another.duplicat
    [10] =＆GT; 1022
    [11] =＆GT; big.dup1
）
 

在保留原有的值（即big.dup和another.duplicate）......我已经经历几乎每个PHP数组函数看上去试图想象战略...想法？

解决方案

对于你的问题阵列和在若重复的末尾添加数字，你只需要循环数组过一次，并临时建立一个帮手阵列如果存储的价值已经被发现（和频率）：

  $ =发现阵列（）;的foreach（$数组和放大器; $值）
{
    如果（is_int（$值））继续; ＃跳过整数值    如果（使用isset（$找到[$值））
    {
        $值= sprintf的（％S-％D'，$价值$ ++发现[$值]）;
    }
    其他
    {
        $发现[$值] = 0;
    }
}
未设置（$值）;
 

演示

OK, there are a lot of examples of duplicate detection and removal in php arrays, using array_unique() etc but what if you want to find dups, modify them, check again in a loop until all dups are now unique?

I think it's something like using array_filter()... so as a more specific example, here's what would come out of a sql statement something like this:

SELECT id, list.comboname 
FROM list
   INNER JOIN (
      SELECT comboname 
      FROM list
       GROUP BY comboname 
       HAVING count(id) > 1
   ) dup ON list.comboname = dup.comboname

To an array of the duplicates in the table:

Array ( 
    [0] => 49 
    [1] => big.dup  
    [2] => 233  
    [3] => another.duplicate  
    [4] => 653  
    [5] => big.dup  
    [6] => 387  
    [7] => big.dup  
    [8] => 729  
    [9] => another.duplicate  
    [10] => 1022  
    [11] => big.dup   
)

Now what I want is some PHP to delete characters until the period so they are unique [or add numbers if needed to the end]

So result would be:

Array (  
    [0] => 49  
    [1] => big.dup  
    [2] => 233  
    [3] => another.duplicate  
    [4] => 653  
    [5] => big.du  
    [6] => 387  
    [7] => big.d  
    [8] => 729  
    [9] => another.duplicat  
    [10] => 1022  
    [11] => big.dup1  
)

While retaining the original value (i.e. big.dup and another.duplicate)... I've looked through just about every PHP array function trying to imagine a strategy ... ideas?

解决方案

For the array in your question and for adding numbers at the end if a duplicate, you only need to loop over the array once and temporary build up a helper array that stores if a value has been already found (and how often):

$found = array();

foreach($array as &$value)
{
    if (is_int($value)) continue; # skip integer values

    if (isset($found[$value]))
    {
        $value = sprintf('%s-%d', $value, ++$found[$value]);
    }
    else
    {
        $found[$value] = 0;
    }
}
unset($value);

Demo

这篇关于PHP：如何识别和数组中的更改，重复值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！