What are some best practices for filtering and counting values from a multidimensional array in PHP?

When filtering and counting values from a multidimensional array in PHP, it's important to iterate through the array and apply the filtering conditions to each element. You can use functions like array_filter() to filter elements based on a callback function, and then use count() to get the total count of filtered elements. 

// Sample multidimensional array
$multiArray = [
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 30],
    ['name' => 'Charlie', 'age' => 35],
    ['name' => 'Alice', 'age' => 20]
];

// Filter array elements where 'name' is 'Alice'
$filteredArray = array_filter($multiArray, function($element) {
    return $element['name'] == 'Alice';
});

// Count the number of filtered elements
$count = count($filteredArray);

echo "Number of elements with name 'Alice': " . $count;

Keywords

multidimensional array filtering counting PHP functions best practices

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