PHP 配列の書き方のまとめ: 配列を簡単に行うための 5 つのテクニック

// 定义一个简单的数组
$fruits = array('apple', 'banana', 'orange');

// 访问数组元素
echo $fruits[0]; // 输出：apple

// 定义一个关联数组
$person = array('name' => 'Alice', 'age' => 30, 'city' => 'New York');

// 访问关联数组元素
echo $person['name']; // 输出：Alice

// 遍历简单数组
$fruits = array('apple', 'banana', 'orange');
foreach($fruits as $fruit) {
    echo $fruit . ' ';
}
// 输出：apple banana orange

// 遍历关联数组
$person = array('name' => 'Alice', 'age' => 30, 'city' => 'New York');
foreach($person as $key => $value) {
    echo $key . ': ' . $value . ' ';
}
// 输出：name: Alice age: 30 city: New York

// 对简单数组进行排序
$numbers = array(5, 3, 8, 1, 2);
sort($numbers);
print_r($numbers);
// 输出：Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 5 [4] => 8 )

// 对关联数组按值进行排序
$prices = array('apple' => 2, 'banana' => 1, 'orange' => 3);
asort($prices);
print_r($prices);
// 输出：Array ( [banana] => 1 [apple] => 2 [orange] => 3 )

// 定义一个多维数组
$students = array(
    array('name' => 'Alice', 'age' => 25, 'grade' => 'A'),
    array('name' => 'Bob', 'age' => 22, 'grade' => 'B'),
    array('name' => 'Charlie', 'age' => 27, 'grade' => 'A')
);

// 访问多维数组元素
echo $students[0]['name']; // 输出：Alice