PHP數組獲取被重複

Question

我有一個PHP數組，有次爲數組值和時間戳值作爲鍵部分是這樣的價值觀：在上面的例子中

array(
     144454884=>"12:00am", 145454884=>"12:30am", 144474884=>"1:00am", 144454864=>"1:30am", 143354884=>"1:00am", 144654884=>"1:30am", 1444567584=>"2:00am " 
    ); 

時間戳值是不是真正的我寫的一個例子他們無用，除非你的時區符合我的要求。

問題： 我需要得到「凌晨1:00」和「凌晨1:30」兩次我可以重複值1點時，如圖答案在這裏：

php return only duplicated entries from an array

我既需要重複值重複兩次，因爲我需要從我的系統中刪除周時間的時間戳，因爲夏令時是重複的，我不想顯示上午1點我只是想顯示這一次不可用。

Answer 1

我不是100％確定你想要什麼，但這是我第你需要的墨水。 假設你的輸入數組稱爲$a

$b = array_flip(array_flip($a)); 
$c = array_diff_key($a, $b); 

$b將包含唯一值的陣列。 $c將包含已刪除的元素。是$b和$c

結果如下：

array(5) { 
    [144454884] = string(7) "12:00am" 
    [145454884] = string(7) "12:30am" 
    [143354884] = string(6) "1:00am" 
    [144654884] = string(6) "1:30am" 
    [1444567584] = string(7) "2:00am " 
} 

array(2) { 
    [144474884] = string(6) "1:00am" 
    [144454864] = string(6) "1:30am" 
} 

Answer 2

此代碼：

<?php 
$array_new = []; 
$array_tmp = []; 
$array = array(1=>'1233',2=>'12334',3 =>'Hello' ,4=>'hello', 5=>'U'); 

//loop trough all elements in array and for ever element create key 
//For "world" key is "world" 
//For "World" key is "world" 
//For "WORLD" key is "world" 
//So all this cases have same key and differenet representation eg. "world" => ["world","World","WORLD"] 
foreach($array as $k => $v){ 
    $index = strtolower($v); 
    $array_tmp[$index][] = $v; 
} 

//loop trough new array with new keys and if there are more than one element(> 1) for some key, all of his representations put in new array 
foreach($array_tmp as $k => $v){ 
    if(count($v) > 1){ 
     foreach($v as $k2 => $v2){ 
      $array_new[] = $v2; 
     } 
    } 
} 

echo '<pre>'; 
print_r($array_new); 
echo '<pre>'; 

Answer 3

一個可能的解決方案保持關鍵信息（我將分配中間結果自己的變量，否則可能會造成混淆閱讀）

$array = array(
    143354883 => "1:00am", 
    144454884 => "12:00am", 
    145454884 => "12:30am", 
    144474884 => "1:00am", 
    144454864 => "1:30am", 
    143354884 => "1:00am", 
    144654884 => "1:30am", 
    1444567584 => "2:00am ", 
    0 => 4, 
    1 => 4, 
    2 => 4, 
    3 => "Test", 
    4 => "TEST", 
    5 => "test " 
); 

// Used this array_iunique function: http://stackoverflow.com/questions/2276349/case-insensitive-array-unique 
function array_iunique($array) { 
    return array_intersect_key(
     $array, 
     array_unique(array_map("StrToLower",$array)) 
    ); 
} 

$unique = array_iunique($array); 

// Then get the difference by key, that will give you all the duplicate values: 
$diff_key = array_diff_key($array, $unique); 

// Now we have to find the values that are in the $diff_key and the $unique because we also want to have those: 
$correspondingValues = array_uintersect($unique, $diff_key, "strcasecmp"); 

// Then we have to combine the $duplicate values with the $diff_key and preserve the keys: 
$result = array_replace($correspondingValues, $diff_key); 
var_dump($result); 

會導致在：

array(10) { 
    [143354883]=> 
    string(6) "1:00am" 
    [144454864]=> 
    string(6) "1:30am" 
    [0]=> 
    int(4) 
    [3]=> 
    string(4) "Test" 
    [144474884]=> 
    string(6) "1:00am" 
    [143354884]=> 
    string(6) "1:00am" 
    [144654884]=> 
    string(6) "1:30am" 
    [1]=> 
    int(4) 
    [2]=> 
    int(4) 
    [4]=> 
    string(4) "TEST" 
}