PHP 배열 고급 응용 프로그램 가이드: 실용적인 팁 및 사례 분석

$array1 = [1, 2, 3];
$array2 = ['a', 'b', 'c'];
$mergedArray = array_merge($array1, $array2);
print_r($mergedArray);

$array = [1, 2, 3, 4, 5, 6, 7, 8, 9];
$chunks = array_chunk($array, 3);
print_r($chunks);

$array = [1, 2, 3, 4, 5, 6];
$filteredArray = array_filter($array, function($item) {
    return $item % 2 == 0;
});
print_r($filteredArray);

$array = [1, 2, 3, 4, 5];
$mappedArray = array_map(function($item) {
    return $item * 2;
}, $array);
print_r($mappedArray);

$array1 = ['a' => ['b' => 'c']];
$array2 = ['a' => ['d' => 'e']];
$mergedArray = array_merge_recursive($array1, $array2);
print_r($mergedArray);

$array = [
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 30],
    ['name' => 'Eve', 'age' => 20]
];

usort($array, function($a, $b) {
    return $a['age'] - $b['age'];
});

print_r($array);

$array = ['a' => 1, 'b' => 2, 'c' => 3];
$keys = array_keys($array);
$values = array_values($array);
print_r($keys);
print_r($values);

$array = ['a' => 1, 'b' => 2, 'c' => 3];
if (array_key_exists('a', $array)) {
    echo "键名'a'存在
";
}
if (in_array(2, $array)) {
    echo "值2存在
";
}