PHP 配列をマージした後、マージが成功したかどうかを確認するにはどうすればよいですか?

$arr1 = [1, 2, 3]; $arr2 = [4, 5, 6]; $merged = array_merge($arr1, $arr2); if (is_array($merged)) { // 合并成功 } else { // 合并失败 }

$length = count($arr1) + count($arr2); $merged = array_merge($arr1, $arr2); if (count($merged) == $length) { // 合并成功 } else { // 合并失败 }

$employees1 = [ ['name' => 'John', 'salary' => 1000], ['name' => 'Jane', 'salary' => 1200], ]; $employees2 = [ ['name' => 'Mike', 'salary' => 900], ['name' => 'Alice', 'salary' => 1100], ]; $mergedEmployees = array_merge($employees1, $employees2); if (count($mergedEmployees) == (count($employees1) + count($employees2))) { // 合并成功 // 访问合并后的员工数据 foreach ($mergedEmployees as $employee) { echo "{$employee['name']} earns \${$employee['salary']}\n"; } } else { // 合并失败，处理错误 }

John earns $1000 Jane earns $1200 Mike earns $900 Alice earns $1100