在我的脚本中,我从数据库中获取数据并将其存储在数组中并将其输出到json中。一切都是正确的,只是我得到的第一个数组是空的,然后第二个数组有正确的数据。我不明白为什么我会得到第一个空数组。获得null数组,然后得到实际结果在php
我的问题可以解决,如果我得到正确的结果数组没有null数组。 这里是我得到的输出
[[],{"url":"example.com\/sign_pdf\/PDFSign.pdf","name":"PDFSign.pdf","signer":"aman","sequence":"1","message":"Hello","flag":"0"}]
我不需要第一个空数组。为什么我会这样做。
这是代码。
if(($_GET['action'])&&($_GET['username'])&&($_GET['key'])) {
$select = $_GET['action'];
$username =$_GET['username']; //no default
$key= $_GET['key'];
if($key=='abcxyz'){
if($select=='select'){
/* connect to the db */
$connect = mysqli_connect('localhost','root','')or die("Couldn't connect to database!");
mysqli_select_db($connect,'sign') or die ("Couldn't find database");
$query ="SELECT * FROM path WHERE signer ='$username' ";
$result = mysqli_query($connect,$query);
$numrows=mysqli_num_rows($result);
$posts[] = array();
if($numrows!==0) {
while($row = mysqli_fetch_array($result)) {
$post['url'] = $row['url'];
$post['name'] = $row['name'];
$post['signer'] = $row['signer'];
$post['sequence'] = $row['sequence'];
$post['message'] = $row['message'];
$post['flag'] = $row['flag'];
array_push($posts, $post);
}
header('Content-type: application/json');
echo json_encode($posts);
}
}
}
}
而不是$ posts [] = array();使用$ posts = array(); –