What are some methods for filtering subarrays in a multidimensional array based on specific key/value pairs in PHP?

When working with multidimensional arrays in PHP, you may need to filter subarrays based on specific key/value pairs. One way to achieve this is by using the array_filter() function along with a custom callback function that checks for the desired key/value pair in each subarray. This allows you to selectively include or exclude subarrays based on your criteria. 

// Sample multidimensional array
$users = [
    ['id' => 1, 'name' => 'Alice', 'age' => 25],
    ['id' => 2, 'name' => 'Bob', 'age' => 30],
    ['id' => 3, 'name' => 'Charlie', 'age' => 28]
];

// Filter subarrays based on age less than 30
$filteredUsers = array_filter($users, function($user) {
    return $user['age'] < 30;
});

// Output the filtered subarrays
print_r($filteredUsers);

Keywords

multidimensional array filtering subarrays key/value pairs PHP functions

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