Question

我知道这个问题之前曾有人提出过，或者可能是我找不到与整个网站有关的问题和答案。对于数组中重复的值的删除过程，我需要一些建议。这是我的代码：

$newarray = array();
foreach($rows as $item) {
 if (!in_array($rows, $newarray)) {  
     $newarray[$item['country_name']]['cityName'][]  = $item['city_name'];
 }

$newarray[$item['country_name']]['hotelName'][] = $item['hotel_name'];
}
echo '<pre>';
print_r($newarray);
echo '</pre>';

这是我的输出：

Array (
[India] => Array
    (
        [cityName] => Array
            (
                [0] => Gurugram
                [1] => Trivandrum
                [2] => Bengaluru
                [3] => Udaipur
                [4] => Salcette
                [5] => Mumbai
                [6] => New Delhi
                [7] => Chennai
                [8] => Salcette
                [9] => Salcette
                [10] => Bengaluru
                [11] => Chennai
                [12] => New Delhi
                [13] => Udaipur
                [14] => Delhi
                [15] => Jaipur
                [16] => Jaipur
            )

如您所见，返回值中有多个重复值。我需要这样的东西：

Array (
[India] => Array
    (
        [cityName] => Array
            (
                [0] => Gurugram
                [1] => Trivandrum
                [2] => Bengaluru
                [3] => Udaipur
                [4] => Mumbai
                [5] => Chennai
                [6] => Salcette
                [7] => Chennai
                [8] => New Delhi
                [9] => Udaipur
                [10] => Delhi
                [11] => Jaipur

            )

Answer 1

希望，这会有所帮助。

<?php
$a=array("a"=>"red","b"=>"green","c"=>"red");
print_r(array_unique($a));
?>

结果看起来像

Array ( [a] => red [b] => green )

在这里，我仅举一个简单的例子。我们可以使用 array_unique（） PHP函数

删除数组中的重复值

Answer 2

您的IF语句中有错误。改变这个：

if (!in_array($rows, $newarray)) { 
 $newarray[$item['country_name']]['cityName'][]  = $item['city_name'];
}

对此：

if (!isset($newarray[$item['country_name']]['cityName']) || !in_array($item['city_name'], $newarray[$item['country_name']]['cityName'])) { 
 $newarray[$item['country_name']]['cityName'][]  = $item['city_name'];
}

Answer 3

您可以为此使用 array_unique 函数

$newarray = array();

foreach($rows as $item) {
   if (!in_array($rows, $newarray)) {  
       $newarray[$item['country_name']]['cityName'][]  = $item['city_name'];
   }

   // because of you array is multidimensional 
   // you can use array_unique function with array_map searching

    $newarray= array_map("unserialize", array_unique(array_map("serialize",$newarray)));

    $newarray[$item['country_name']]['hotelName'][] = $item['hotel_name'];
}

echo '<pre>';
print_r($newarray);
echo '</pre>';

Answer 4

将$ rows in更改为$ item ['city_name']并尝试：

ds = gdal.Open('tif_file.tif', gdal.GA_ReadOnly)
rb = ds.GetRasterBand(1)
img_array = rb.ReadAsArray()

Answer 5

修复后试试这个：）

$newarray = array();
foreach($rows as $item) {
 $newarray[$item['country_name']]['cityName'][]  = $item['city_name'];
 if(count($newarray[$item['country_name']]['cityName']) > 1)
 {
   $temp_array = array_values($newarray[$item['country_name']]['cityName']);//get values and assign it in new array 
   $temp_array = array_unique($newarray[$item['country_name']]['cityName']);// remove duplicate elements 
   $temp_array = array_filter($newarray[$item['country_name']]['cityName']);// remove blank elements from array - must use after merging or unique
   $newarray[$item['country_name']]['cityName'] = $temp_array

}

$newarray[$item['country_name']]['hotelName'][] = $item['hotel_name'];
}
echo '<pre>';
print_r($newarray);
echo '</pre>';

无法删除php

5 个答案: