Counting occurrence of specific value in an Array with PHP [duplicate] - php

Question

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Count number of values in array with a given value
(8 answers)
Closed 3 years ago.
I am trying to find a native PHP function that will allow me to count the number of occurrences of a particular value in an array. I am familiar with the array_count_values() function, but that returns the count of all values in an array. Is there a function that allows you to pass the value and just return the instance count for that particular value? For example:
$array = array(1, 2, 3, 3, 3, 4, 4, 5, 6, 6, 6, 6, 7);
$instances = some_native_function(6, $array); //$instances will be equal to 4
I know how to create my own function, but why re-invent the wheel?

Answer 1

function array_count_values_of($value, $array) {
$counts = array_count_values($array);
return $counts[$value];
}
Not native, but come on, it's simple enough. ;-)
Alternatively:
echo count(array_filter($array, function ($n) { return $n == 6; }));
Or:
echo array_reduce($array, function ($v, $n) { return $v + ($n == 6); }, 0);
Or:
echo count(array_keys($array, 6));

Answer 2

This solution may be near to your requirement
$array = array(1, 2, 3, 3, 3, 4, 4, 5, 6, 6, 6, 6, 7);
print_r(array_count_values($array));
Result:
Array
( [1] => 1 ,[2] => 1 , [3] => 3, [4] => 2,[5] =>1, [6] => 4, [7] => 1 )
for details.

Answer 3

As of PHP 5.4.0 you can use function array dereferencing for the index [6] of the array resulting from array_count_values():
$instances = array_count_values($array)[6];
So to check and assign 0 if not found:
$instances = array_count_values($array)[6] ?? 0;

Answer 4

Assume we have the following array:
$stockonhand = array( "large green", "small blue", "xlarge brown", "large green", "medieum yellow", "xlarge brown", "large green");
1) Copy and paste this function once on top your page.
function arraycount($array, $value){
$counter = 0;
foreach($array as $thisvalue) /*go through every value in the array*/
{
if($thisvalue === $value){ /*if this one value of the array is equal to the value we are checking*/
$counter++; /*increase the count by 1*/
}
}
return $counter;
}
2) All what you need to do next is to apply the function every time you want to count any particular value in any array. For example:
echo arraycount($stockonhand, "large green"); /*will return 3*/
echo arraycount($stockonhand, "xlarge brown"); /*will return 2*/

Answer 5

Say I have an array like this:
$array = array('', '', 'other', '', 'other');
$counter = 0;
foreach($array as $value)
{
if($value === '')
$counter++;
}
echo $counter;
This gives the number of times ' ' is repeating in the array

Answer 6

This is exactly what you looking for
<?php
$MainString = 'Yellow Green Orange Blue Yellow Black White Purple';
$FinderString = 'Yellow Blue White';
$mainArray = explode(" ", $MainString);
$findingArray = explode(" ", $FinderString);
$count = 0;
$eachtotal = array_count_values($mainArray);
foreach($findingArray as $find){
$count += $eachtotal[$find];
}
echo $count;
?>