PHP二维数组数组搜索

$students = array(
    array("name" => "John", "age" => 20, "grade" => "A"),
    array("name" => "Jane", "age" => 22, "grade" => "B"),
    array("name" => "Tom", "age" => 21, "grade" => "A"),
    array("name" => "Alice", "age" => 19, "grade" => "C")
);

$searchResults = array();

foreach ($students as $student) {
    if ($student["age"] >= 20) {
        $searchResults[] = $student;
    }
}

// 输出搜索结果
foreach ($searchResults as $result) {
    echo "姓名：" . $result["name"] . "，年龄：" . $result["age"] . "，成绩：" . $result["grade"] . "<br>";
}

姓名：John，年龄：20，成绩：A
姓名：Jane，年龄：22，成绩：B
姓名：Tom，年龄：21，成绩：A