在PHP中输出重复次数最多的值

我有一个数组，有点像：

$concat=array("DARK HORSE,KATY PERRY", "DARK HORSE,KATY PERRY", "WHEN IT RAINS,PARAMORE", "LITHIUM,NIRVANA")
//$concat = song and artist together separated by a comma

我需要输出出现次数最多的值，因此在上面的数组中，我需要输出字符串=DARK HORSE，KATY PERRY

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谢谢：

您可以使用array\u count\u值和array\u键输出结果：

echo key(array_count_values($concat));

$concat=array("DARK HORSE,KATY PERRY", "DARK HORSE,KATY PERRY", "WHEN IT RAINS,PARAMORE", "LITHIUM,NIRVANA");
//counts frequencies
$count_array = array_count_values($concat);

//gets the keys instead of the values
$count_keys = array_keys($count_array);

//echoes only the first key
echo current($count_keys);

//Or print all values and keys
print_r($count_array);

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您可以使用array_count_值来获取一个以实例为键、以频率为值的数组。然后需要将数组从高到低进行排序，维护索引arsort这一点很重要

因此：

数组\计数\值

//your array
$concat=array("DARK HORSE,KATY PERRY", "DARK HORSE,KATY PERRY", "WHEN IT RAINS,PARAMORE", "LITHIUM,NIRVANA")

//get all the frequencies
$frequencies = array_count_values($concat);

//make sure to sort it since array_count_values doesn't return a sorted array
arsort($frequencies);

//reset the array because you can't trust keys to get the first element by itself
reset($frequencies);

//get the first key
echo key($frequencies);