Question

嘿，我的网站上有一个新功能，你可以通过在搜索输入中输入一些关键字来搜索ya项目。当然我使用的是ajax，我需要一个新的函数，它对数组进行排序或排序，该数组保存数据库中与用户在输入字段中写入的关键字相关的项信息。当用户点击“ m ”时，应该以这种方式显示。

array [["836","123","Malaga - Ocean","1"],
       ["834","123","Malaga City","1"],
       ["838","123","DayZ - Novo Turm #1","0"],
       ["839","123","DayZ - Novo Turm #2","0"],
       ["840","123","DayZ - Novo Turm #3","0"]]

但是，如果我正在搜索以字母“ m ”开头的内容，则应在结果中首先显示“马拉加城市”和“马拉加 - 海洋”。

我正在搜索一个表，搜索我收集它的关键字。但是如果我在每个不同的表格中添加数组，那么每次图片表的结果都是如此。

MySQL的：

$sql_picture = "SELECT * FROM pictures [...] ORDER BY name LIMIT 5";
$sql_videos = "SELECT * FROM videos [...] ORDER BY name LIMIT 5";
$sql_audio = "SELECT * FROM audio [...] ORDER BY name LIMIT 5";
$sql_documents = "SELECT * FROM documents [...] ORDER BY name LIMIT 5";

PHP：

$collectedDataName = array();

for($i = 0; $i < count($collectData); $i++){
    $collectedDataName[$i] = $collectData[$i][2];
}

$collectData_lowercase = array_map('strtolower', $collectedDataName);

array_multisort($collectData_lowercase, SORT_ASC, SORT_STRING, $collectedDataName);

$returnData = array();

for($j = 0; $j < 5; $j++){
    for($i = 0; $i < count($collectData); $i++){
        if($collectData[$i][2] === $collectedDataName[$j]){
            $returnData[$j] = $collectData[$i];
        }
    }
}

echo json_encode($returnData);

结果：

array [["838","123","DayZ - Novo Turm #1","0"],
      ["839","123","DayZ - Novo Turm #2","0"],
      ["840","123","DayZ - Novo Turm #3","0"],
      ["836","123","Malaga - Ocean","1"],
      ["834","123","Malaga City","1"]]

如何根据与变量相关的字符串值对多维数组进行排序？

Answer 1

您的问题有两种可能的解决方案：

<强> 1。 SQL解决方案

让数据库使用union进行排序。例如：

SELECT
   id1, 
   id2,
   name
FROM
   (
       (SELECT id1, id2, name FROM pictures WHERE something=... ORDER BY name LIMIT 5)
       UNION ALL
       (SELECT id1, id2, name FROM videos WHERE something=... ORDER BY name LIMIT 5)
    ) AS q
ORDER BY
   name

<强> 2。 PHP解决方案

您正在进行非标准排序，因此您需要使用usort，它采用比较两个数组项的比较器函数：

$allData = array_merge($sql_picture, $sql_video, ...);
usort($allData, function($a, $b) { return strcmp($a[2], $b[2]); });

Answer 2

你想根据输入值对多维数组进行排序，有点像我们在sql中使用

select * from table where column like 'inputValue%'

这是一个仅基于php的解决方案

$inputvalue = 'm';
$inputvalue = strtolower($inputvalue);

$collectData = [["838","123","DayZ - Novo Turm #1","0"],
             ["834","123","Malaga City","1"],
             ["839","123","DayZ - Novo Turm #2","0"],         
             ["836","123","Malaga - Ocean","1"],
             ["840","123","DayZ - Novo Turm #3","0"],
            ];

/*
we use strpos to check if the input value is contained in the strings array, if not we use levenshtein to calculate the distance between them.*/

$distances = array();
$positions = array();
for ($i=0; $i < count($collectData); $i++) {    
  $current_val = strtolower($collectData[$i][2]);
  if (strpos($current_val, $inputvalue)!==false)
    $distance = strpos($current_val, $inputvalue);
  else
    $distance = levenshtein($inputvalue, $current_val);

  $distances[] = $distance;        
  $positions[] = array("distance"=>$distance, "position"=>$i);        
}

/*we sort distances*/
sort($distances);

/* we reorder collectData based on distances sort  */
$returnData = array();
for ($j=0; $j<count($distances); $j++) {
  for ($k=0; $k<count($positions); $k++) {
    $val = $collectData[$positions[$k]["position"]];

    if ($distances[$j]==$positions[$k]["distance"] && !in_array($val, $returnData)) {
        $returnData[] = $val;
        break;
    }
  }
}

return $returnData;

levenshtein php doc here levenshtein function

Answer 3

可以array_multisort帮忙吗？您是否打算返回仅以“m”开头的结果？

<?php
// create an array of the "column" to sort on...
foreach ($returnData as $row)  
{
    $test[] = $row[2];
}

// sort it...
array_multisort($test, SORT_DESC, $returnData);
?>

（PHP）如何使用与变量相关的字符串来订购多维数组？

3 个答案: