我在PHP中有一个多维数组，如下所示：
$array = Array (
[0] => Array ( [bill] => 1 )
[1] => Array ( [bill] => 1 )
[2] => Array ( [bill] => 1 )
[3] => Array ( [bill] => 1 )
[4] => Array ( [jack] => 5 )
[5] => Array ( [jack] => 5 )
[6] => Array ( [jake] => 6 )
[7] => Array ( [jake] => 6 )
[8] => Array ( [jake] => 6 )
[9] => Array ( [jake] => 6 )
[10] => Array ( [sara] => 7 )
[11] => Array ( [sara] => 7 )
[12] => Array ( [sara] => 7 )
[13] => Array ( [sara] => 7 )
[14] => Array ( [william] => 8 )
[15] => Array ( [william] => 8 )
[16] => Array ( [william] => 8 )
[17] => Array ( [william] => 8 )
[19] => Array ( [william] => 8 )
[20] => Array ( [martin] => 9 )
[21] => Array ( [martin] => 9 )
[22] => Array ( [martin] => 9 )
[23] => Array ( [tara] => 10 )
[24] => Array ( [tara] => 10 )
[25] => Array ( [tara] => 10 )
[26] => Array ( [tara] => 10 )
);
我想将$array转换为$result，以便它可以首先根据相似元素的数量对数组进行排序，然后返回前五个值。例如，$array在$array变量中有五个相似的[william] => 8、四个相似的[bill] => 1、四个相似的[jake] => 6、四个相似的[sara] => 7、四个相似的[tara] => 10、三个相似的[martin] => 9和两个相似的[jack] => 5。因此，具有前五个最重复元素的$result变量应如下所示：
$result = Array (
[0] => Array ( [william] => 8 )
[1] => Array ( [bill] => 1 )
[2] => Array ( [jake] => 6 )
[3] => Array ( [sara] => 7 )
[4] => Array ( [tara] => 10 )
);
你能帮我如何解决这个问题吗？
创建一个组合键和值的新数组，并使用 array_count_values 来计算出现的 # 次。最后排序并检索前 5 名。
$new = array();
foreach($array as $key => $value) {
$new[] = key($value) . '_' . current($value);
}
$counts = array_count_values($new);
arsort($counts);
$results = array();
foreach(array_splice($counts,0,5) as $key => $count) {
$key = explode('_',$key);
$results[] = array($key[0] => $key[1]);
}
print_r($results);
$result = array();
$occurrence_map = array();
$pair_map = array();
foreach( $array as $record )
{
$key = key($record);
$pair_map[ $key ] = $record;
++$occurrence_map[ $key ];
}
while( 5 > count($result) && !empty($occurrence_map) )
{
$related_key = '';
$max_value = $occurrence_map[ key($occurrence_map) ];
foreach( $occurrence_map as $key => $value )
{
if( $value > $max_value )
{
$max_value = $value;
$related_key = $key;
}
}
$result[] = $pair_map[$related_key];
unset( $occurrence_map[$related_key] );
}
结果：
array(5) {
[0]=>
array(1) {
["william"]=>
int(8)
}
[1]=>
array(1) {
["bill"]=>
int(1)
}
[2]=>
array(1) {
["jake"]=>
int(6)
}
[3]=>
array(1) {
["sara"]=>
int(7)
}
[4]=>
array(1) {
["tara"]=>
int(10)
}
}
希望这对你有帮助。