使用php对同一科目的所有学生进行平均分。

<?php
// 定义学生及其成绩数组
$studentScores = array(
    "Alice" => array("subject1" => 80, "subject2" => 90, "subject3" => 85),
    "Bob" => array("subject1" => 75, "subject2" => 95, "subject3" => 80),
    "Charlie" => array("subject1" => 70, "subject2" => 85, "subject3" => 90)
);

// 计算平均分
$totalScore = 0;
$studentCount = count($studentScores);

foreach ($studentScores as $student) {
    $totalScore += array_sum($student); // 对学生的成绩求和
}

$averageScore = $totalScore / $studentCount;

// 输出结果
echo "所有学生的平均分是：" . $averageScore;
?>