Php: Most Frequent Value in Array

PHP: Most frequent value in array

$values = array_count_values($array);
arsort($values);
$popular = array_slice(array_keys($values), 0, 5, true);

• array_count_values() gets the count of the number of times each item appears in an array
• arsort() sorts the array by number of occurrences in reverse order
• array_keys() gets the actual value which is the array key in the results from array_count_values()
• array_slice() gives us the first five elements of the results

Demo

$array = [1,2,3,4,238, 7, 86, 79, 55, 92, 55, 7, 254, 9, 75, 238, 89, 238];
$values = array_count_values($array);
arsort($values);
$popular = array_slice(array_keys($values), 0, 5, true);

array (
  0 => 238,
  1 => 55,
  2 => 7,
  3 => 4,
  4 => 3,
)

Getting the most repeated values in an array

This should work:

$count=array_count_values($array);//Counts the values in the array, returns associatve array
arsort($count);//Sort it from highest to lowest
$keys=array_keys($count);//Split the array so we can find the most occuring key
echo "The most occuring value is $keys[0][1] with $keys[0][0] occurences."

PHP Get most repeated value in Array

"Serializing way" for searching most repeated couples (name,id):

$out = array();
foreach($arr as $el){
   $key = serialize($el);
   if (!isset($out[$key]))
       $out[$key]=1;
   else
       $out[$key]++;
}

arsort($out);

foreach($out as $el=>$count){
   $item = unserialize($el);
   echo "Name = ".$item['name'].' ID = '.$item['id'].' Count = '.$count.'<br/>';
}

Output:

Name = A ID = 120689 Count = 3
Name = B ID = 924572 Count = 2
Name = C ID = 919644 Count = 1

update Without loop

.....
arsort($out);

$most  = unserialize(key($out));
$most_count = array_shift($out);

echo $most['name'];
echo $most['id'];
echo $most_count;

Output:

A
120689
3

Find the most frequent number in PHP array

I have an array in PHP with repeating numbers and I would like to find the most frequent but only when there is only one of that.

Your approach seems rather complicated.

Here's how I'd do that:

$numbers = [1, 6, 5, 6, 2, 1, 6, 7, 8]; // positive test case
//$numbers = [1, 6, 5, 6, 2, 1, 6, 7, 8, 1];  // negative test case

$count = array_count_values($numbers); // get count of occurrence for each number

arsort($count); // sort by occurrence, descending

$first = key($count); // get key of first element, because that is the/one
                      // of the highest number(s)
$count_first = current($count); // get occurrence for first array value
$count_second = next($count); // get occurrence for second array value

if($count_first != $count_second) { // did they occur in different frequencies?
  echo $first . ' occurred most in input array.';
}
else {
  echo 'input array contained multiple values with highest occurrence.';
}

php - Most frequent element in array?

Your solution seems reasonable.

<?php
    echo mostFrequent(array('cheese','wine','cheese','bread','cheese','bread'));
?>

How to enter my string of numbers into an array to get the most frequent number?

Use explode() to build your array, based on the delimiter ", " :

$string_of_numbers = "1, 2, 4, 5, 6, 3, 2, 2, 1, 4, 4, 4";    

$numbers = explode(", ", $string_of_numbers);

var_dump($numbers);

Output

array (size=12)
  0 => string '1' (length=1)
  1 => string '2' (length=1)
  2 => string '4' (length=1)
  3 => string '5' (length=1)
  4 => string '6' (length=1)
  5 => string '3' (length=1)
  6 => string '2' (length=1)
  7 => string '2' (length=1)
  8 => string '1' (length=1)
  9 => string '4' (length=1)
  10 => string '4' (length=1)
  11 => string '4' (length=1)

Get the most frequent value in a string in PHP

You can do it in four steps:

1. Use str_split() to create array from string which contains single digits.

2. Use array_count_values() on this splitted string. It returns array which indexes are your digits and values are count of occurences of this digits.

3. Use arsort() to sort array.

4. Get first element of array using reset() and key() functions.

Example:

<?php

$string = '198419489151085175';

$splittedString = str_split($string);
$charactersCount = array_count_values($splittedString);
arsort($charactersCount);

reset($charactersCount);
$firstKey = key($charactersCount);

var_dump($charactersCount);
var_dump($firstKey);

And result is:

array(7) {
  [1]=>
  int(5)
  [9]=>
  int(3)
  [8]=>
  int(3)
  [5]=>
  int(3)
  [4]=>
  int(2)
  [0]=>
  int(1)
  [7]=>
  int(1)
}

1 // this is your result

Get the most repeated elements inside array, if more than one is the most repeated, get results alphabatically in order PHP

Based on this answer, this will do:

$array = array('orange','apple','banana','apple','orange','grape','orange', 'mango','apple');

$values = array_count_values($array);

$max = max($values);

$fruits = array_filter($values, function($num) use ($max){ return $max == $num; });

$ksort($fruits);

Output:

[
apple => 3,
orange => 3
]

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