我正在为android应用程序开发一个Web服务，该Web服务在PHP中从MySQL数据库获取数据。。。我遇到的问题是，有些项目有多个细节，但我的代码只为每个项目获取一个细节。我正在获取JSON格式的数据。
你可以在这里查看
这是我的代码
function requiredData(){
$db = $this->dbConnection();
//$sql = "SELECT * FROM projects JOIN project_details ON projects.project_id=project_details.project_id";
$sql = "SELECT * FROM projects";
$queryResult = $db->query($sql);
if($queryResult->num_rows > 0){
while($row = $queryResult->fetch_assoc()){
$pid = $row['project_id'];
$detailsql = "SELECT * FROM project_details WHERE project_id=$pid";
$sqlResult = $db->query($detailsql);
if($sqlResult->num_rows > 0){
while ($d = $sqlResult->fetch_assoc()){
$r = array(
"project_id" => $d['project_id'],
"project_detail" => array(
"work_done" => $d['project_detail'],
"payment_for_work" => $d['project_payment'],
"payment_status" => $d['project_payment_status'],
"detail_id" => $d['project_detail_id']
)
);
}
}
$results[$row['project_name']] = array(
"project_id" => $row["project_id"],
"project_start_date" => $row["project_start_date"],
"project_due_date" => $row["project_due_date"],
"project_currency" => $row["project_currency"],
"project_work_details" => $r
);
}
}
return $results;
}
提前感谢您的帮助
问题在第二个while循环中。您正在将数组分配给$r，每次$r值都会覆盖。
所以，我现在把数组分配给另一个数组，它将变成二维数组，就像这样；
while ($d = $sqlResult->fetch_assoc()){
$r[] = array(
"project_id" => $d['project_id'],
"project_detail" => array(
"work_done" => $d['project_detail'],
"payment_for_work" => $d['project_payment'],
"payment_status" => $d['project_payment_status'],
"detail_id" => $d['project_detail_id']
)
);
}
现在您可以使用$r，它将具有项目的多个详细信息。