Find Common Values in Multiple Arrays with PHP

Find common values in multiple arrays with PHP

array_intersect()

$intersect = array_intersect($array1,$array2,$array3);

If you don't know how many arrays you have, then build up an array of arrays and user call_user_func_array()

$list = array();
$list[] = $array1;
$list[] = $array2;
$list[] = $array3;
$intersect = call_user_func_array('array_intersect',$list);

Finding common elements in multiple arrays php

array_intersect()

$intersect = array_intersect($array1,$array2,$array3);

If you don't know how many arrays you have, then build up an array of arrays and user call_user_func_array()

 $list = array();
 $list[] = $array1;
 $list[] = $array2;
 $list[] = $array3;
 $intersect = call_user_func_array('array_intersect',$list);

Reference Here

How to get common values from two different arrays in PHP

Native PHP functions are faster than trying to build your own algorithm.

$result = array_intersect($array1, $array2);

Find Common most values in multidimensional array in PHP

You might use a foreach and use the array values as the key and increment each times it matches.

At the end sort the keys using ksort and return the keys using array_keys :

$arrays = [
    ['000', '001', '002', '003'],
    ['000', '001', '002'],
    ['000', '001'],
    ['000', '001', '002', '003'],
    ['000', '001', '002'],
    ['000', '001'],
];

$result = [];

foreach ($arrays as $array) {
    foreach ($array as $a) {
        if (!array_key_exists($a, $result)) {
            $result[$a] = 1;
            continue;
        }
        $result[$a] += 1;
    }
}
ksort($result);
print_r(array_keys($result));

Demo

Ouput

Array
(
    [0] => 000
    [1] => 001
    [2] => 002
    [3] => 003
)

Finding same values on multiple array data PHP

This works!

$arr1 = [1,2,3,4,5,9,14];
$arr2 = [1,2,10];
$arr3 = [1,2,5];
$arr4 = [1,2,3,5];

$duplicates = checkduplicate($arr1, $arr2, $arr3, $arr4);

print_r($duplicates);

function checkduplicate($arr1, $arr2, $arr3, $arr4)
{
    $keys = [];
    foreach($arr1 as $key)
    {
        if(in_array($key, $arr2) && in_array($key, $arr3) && in_array($key, $arr4))
        {
            $keys[] = $key;
        }
    }

    return $keys;
}

This iterates over all the items in the first array, and check if they also contain in the others

You can also use array intersect, which takes multiple arrays

$duplicates = array_intersect($arr1, $arr2, $arr3, $arr4);

PHP – Find common string in value in multiple arrays and combine output

You can do it via iteration like this:

$bears = array(
    array('label' => "Parent", 'ages' => "23 24 25 26 27 28 29 30 31 32 33"),
    array('label' =>"Adult", 'ages' => "19 20 21 22 23 24 25 26 27 28 29"),
    array('label' => "Teenager", 'ages' => "14 15 16 17 18")
);

$newArray = array();

foreach($bears as $bear)
{
    if(strpos($bear['ages'], '23') !== false)
            $newArray[] = $bear['label'];
}

echo("Results:\n");
var_dump($newArray);

Note you have to encapsulate "label" in quotes in your arrays as they are strings.

Find values that are present in all arrays (PHP)

Use array_intersect

$arrayOfArrays[] = [76,964,34,66775,3,88,99,69];
$arrayOfArrays[] = [69,55,65,657,436,6345,8654];
$arrayOfArrays[] = [54,543,496,3455,47556,69,234,436557];
$arrayOfArrays[] = [4564536,4543,777,3445,43768,2334,69,35,574];

$intersect = array_intersect(
    $arrayOfArrays[0],$arrayOfArrays[1],$arrayOfArrays[2],$arrayOfArrays[3]
);

Or recursively like the answer by @Mr J

$arrayOfArrays[] = [76,964,34,66775,3,88,99,69];
$arrayOfArrays[] = [69,55,65,657,436,6345,8654];
$arrayOfArrays[] = [54,543,496,3455,47556,69,234,436557];
$arrayOfArrays[] = [4564536,4543,777,3445,43768,2334,69,35,574];

$intersect = call_user_func_array('array_intersect', $arrayOfArrays);

How to find common elements in two arrays?

There is an array_intersect function that does pretty much what you need. If you want to compare the elements using regular expressions, try preg_grep, but you will need to prepare the pattern first.

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