Counting Occurrence of Specific Value in an Array with PHP

PHP - count specific array values

$array = array("Kyle","Ben","Sue","Phil","Ben","Mary","Sue","Ben");
$counts = array_count_values($array);
echo $counts['Ben'];

count the number of occurrence of each element in an array (in php)

As mentioned in the comments array_count_values() is the optimal solution in php. But you must write it out aka show your understanding on how to search an array its rather simple as well.

$a=['a','b','a','c','a','d'];
$output=[]; 

for($i = 0; $i < count($a); $i++){
    if(!isset($output[$a[$i]])){
      $output[$a[$i]] = 1;
    }

    else{
        $output[$a[$i]] = $output[$a[$i]] + 1;
    }
}

var_dump($output);

//output
array(4) {
  ["a"] => int(3)
  ["b"] => int(1)
  ["c"] => int(1)
  ["d"] => int(1)
}

Count occurrences of a value in a column of an array of object arrays

$count = 0;
foreach ($array as $item) {
  if ($item->type === 'photo') {
    $count++;
  }
}

How to count specific value from array PHP?

Try this. See comments for step-by-step explanation.
Outputs:

array(2) {
  ["channel_1"]=>
  int(1)
  ["channel_0"]=>
  int(2)
}

Code:

<?php

// Your input array.
$a =
[
    [
        'Report' =>
        [
            'id' => 10,
            'channel' => 1
        ]
    ],
    [
        'Report' =>
        [
            'id' => 92,
            'channel' => 0
        ]
    ],
    
    [
        'Report' =>
        [
            'id' => 18,
            'channel' => 0
        ]
    ]
];

// Output array will hold channel_N => count pairs
$result = [];

// Loop over all reports
foreach ($a as $report => $values)
{
    // Key takes form of channel_ + channel number
    $key = "channel_{$values['Report']['channel']}";
    
    if (!isset($result[$key]))
        // New? Count 1 item to start.
        $result[$key] = 1;
    else
        // Already seen this, add one to counter.
        $result[$key]++;
}

var_dump($result);
/*
Output:
array(2) {
  ["channel_1"]=>
  int(1)
  ["channel_0"]=>
  int(2)
}
*/

count occurrences of values in an associative array in php

Combination of array_count_values & array_column (PHP 5 >= 5.5.0, PHP 7) should work -

$counts = array_count_values(
    array_column($employees, 'position')
);

Output

array(3) {
  [1]=>
  int(1)
  [2]=>
  int(2)
  [3]=>
  int(2)
}

Update

$final = array_filter($counts, function($a) {
   return $a >= 2;
});

Output

array(2) {
  [2]=>
  int(2)
  [3]=>
  int(2)
}

Demo

Check how many times specific value in array PHP

Several ways.

$cnt = count(array_filter($uid,function($a) {return $a==12;}));

or

$tmp = array_count_values($uid);
$cnt = $tmp[12];

or any number of other methods.

How do I count occurrence of duplicate items in array

array_count_values, enjoy :-)

$array = array(12,43,66,21,56,43,43,78,78,100,43,43,43,21);
$vals = array_count_values($array);
echo 'No. of NON Duplicate Items: '.count($vals).'<br><br>';
print_r($vals);

Result:

No. of NON Duplicate Items: 7
Array
(
    [12] => 1
    [43] => 6
    [66] => 1
    [21] => 2
    [56] => 1
    [78] => 2
    [100] => 1
)

---

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