在我的項目中顯示了有關(guān)圖表的統(tǒng)計數(shù)據(jù)。其中一項數(shù)據(jù)是本周和上周網(wǎng)站的點(diǎn)擊次數(shù)。兩者目前都在自己的折線圖中。那里的所有內(nèi)容也都顯示沒有任何問題。但現(xiàn)在我想把本周的數(shù)據(jù)和上周的數(shù)據(jù)放到一個折線圖中，以便快速比較本周和上周網(wǎng)站的訪問量。因此，我嘗試將兩個查詢的輸出獲取到一個 JSON 中，但總是收到此錯誤 ( json_encode() expects parameter 2 to be int, array given)。我認(rèn)為這應(yīng)該以不同的方式解決，但我還沒有找到任何其他想法或方法。代碼：    header("Content-Type: application/json");    include "../../../includes/db.php";    $stmt = $connection->prepare("SELECT website_stats_homepage AS current_week FROM website_stats WHERE yearweek(DATE(website_stats_date), 1) = yearweek(curdate(), 1) ORDER BY website_stats_date");    //$stmt = $connection->prepare("SELECT website_stats_homepage FROM website_stats WHERE website_stats_date >= curdate() - INTERVAL DAYOFWEEK(curdate())+6 DAY AND website_stats_date < curdate() - INTERVAL DAYOFWEEK(curdate())-2 DAY");    $stmt->execute();    $result = $stmt->get_result();    $stmt1 = $connection->prepare("SELECT website_stats_homepage AS last_week FROM website_stats WHERE website_stats_date >= curdate() - INTERVAL DAYOFWEEK(curdate())+6 DAY AND website_stats_date < curdate() - INTERVAL DAYOFWEEK(curdate())-2 DAY");    $stmt1->execute();    $result1 = $stmt1->get_result();    $data = array();    foreach($result as $row) {        $data[] = $row;    }    $data1 = array();    foreach($result1 as $row1) {        $data1[] = $row1;    }    $stmt->close();    $stmt1->close();    echo json_encode($data, $data1);