How does a PHP function return an array?

PHP functions can return arrays by using the return statement: Return a simple array: return ['value', 'value', 'value']; Return an associative array: return ['key' => 'value', 'key ' => 'value']; Dynamically return an array based on parameters: return ['key' => calculated value, 'key' => calculated value];

##How does a PHP function return an array?

In PHP, a function can return an array by using the

return statement. Let’s explore how this is done through some practical examples.

Example 1: Return a simple array

function getStates() {
  return ['Alabama', 'Alaska', 'Arizona', 'Arkansas'];
}

$states = getStates();
print_r($states);

This will output an array containing the states of the United States.

Example 2: Returning an associative array

function getUserInfo($userId) {
  // 模拟从数据库获取用户数据
  return [
    'id' => $userId,
    'name' => 'John Doe',
    'email' => 'johndoe@example.com'
  ];
}

$userInfo = getUserInfo(123);
echo $userInfo['name']; // 输出：John Doe

This will return an associative array containing the user details.

Example 3: Return a dynamic array using the parameters of the function

function calculateDiscount($price, $discountPercentage) {
  $discountAmount = $price * ($discountPercentage / 100);
  return ['discount_amount' => $discountAmount, 'final_price' => $price - $discountAmount];
}

$discountInfo = calculateDiscount(100, 20);
echo $discountInfo['final_price']; // 输出：80

This function dynamically returns an array based on the parameter value.

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