PHP Arrays

Indexed Arrays

$fruits = ["apple", "banana", "cherry"];
echo $fruits[0];  // apple

Associative Arrays

$ages = ["Alice" => 25, "Bob" => 30];
echo $ages["Alice"];  // 25

Multidimensional Arrays

$matrix = [
    [1, 2, 3],
    [4, 5, 6]
];

Common Functions

count($arr);         // Array length
array_push($arr, $val);  // Add to end
array_pop($arr);     // Remove from end
sort($arr);          // Sort ascending
array_merge($a, $b); // Merge arrays
in_array($val, $arr); // Check if exists

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