Android、php、MySQL和phpMyAdmin

希望你们能给我们一些启示。我正在从事一个Android Capstone项目，该项目通过php和phpMyAdmin连接到MySQL数据库。我试图将三个参数（childId、date1和date5）从Android传递到php脚本，但它不起作用。当我尝试打印结果时，Logcat只是显示错误。我认为问题出在我的php脚本中，因为如果我只传递两个参数（childId和date1），那么一切都可以正常工作。非常感谢您的帮助。以下是我的code.php：

<?php
require "conn.php";

$response = array();

if($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$childId = $_POST["childId"];
$date1 = $_POST["date"];
$date5 = $_POST["date"];


$sql = "SELECT * FROM child_sessions WHERE childId like '$childId' AND date BETWEEN '$date1' AND '$date5'";


$result = $conn->query($sql);

if($result->num_rows > 0) {

    $response["child_sessions"] = array();

    while($row = mysqli_fetch_array($result)) {
        $child_sessions = array();
        $child_sessions["date"] = $row["date"];
        $child_sessions["timeIn"] = $row["timeIn"];
        $child_sessions["timeOut"] = $row["timeOut"];
        $child_sessions["duration"] = $row["duration"];
        $child_sessions["childId"] = $row["childId"];
        $child_sessions["sessionCost"] = $row["sessionCost"];           
        array_push($response["child_sessions"], $child_sessions);
    }

    // success
    $response["success"] = 1;

    echo json_encode($response);
} else {
    echo "Error";
}

$conn->close();
?>

---

提前感谢。

您对单个“日期”参数编码了两次（并在php中读取了两次）。修复php和java，使其具有适当的参数键date1和date5

因此，在php脚本中：

$date1 = $_POST["date1"];
$date5 = $_POST["date5"];

在java中，将行更改为：

String post_data = URLEncoder.encode("childId", "UTF-8") + "=" + URLEncoder.encode(childId, "UTF-8") + "&"+
            URLEncoder.encode("date1", "UTF-8") + "=" + URLEncoder.encode(date1, "UTF-8") + "&" +
            URLEncoder.encode("date5", "UTF-8") + "=" + URLEncoder.encode(date5, "UTF-8");

String post_data = URLEncoder.encode("childId", "UTF-8") + "=" + URLEncoder.encode(childId, "UTF-8") + "&"+
            URLEncoder.encode("date1", "UTF-8") + "=" + URLEncoder.encode(date1, "UTF-8") + "&" +
            URLEncoder.encode("date5", "UTF-8") + "=" + URLEncoder.encode(date5, "UTF-8");