How can you efficiently handle nested arrays and loops when working with grouped data in PHP?

When working with grouped data in PHP that involves nested arrays and loops, it is essential to efficiently handle the iteration through the data structure. One way to do this is by using nested foreach loops to iterate through each level of the nested arrays. By properly structuring the loops and accessing the elements within the arrays, you can effectively process and manipulate the grouped data. 

$data = [
    'group1' => [
        'item1',
        'item2',
        'item3'
    ],
    'group2' => [
        'item4',
        'item5'
    ]
];

foreach ($data as $group => $items) {
    echo "Group: $group\n";
    
    foreach ($items as $item) {
        echo "- $item\n";
    }
}

Keywords

nested arrays loops grouped data PHP functions efficiency

Related Questions