PHP函数,用于计算(MySql)查询循环中返回null的单个行
我想在查询循环中包含一个php函数,它只输出表中的所有行 此函数将返回另一个查询,计算单个用户的行数,并与第一个查询一起编码 该函数可以工作,如果我回显userId变量,我就正确了,但是出于某种原因,count查询返回null 我需要一些帮助,谢谢PHP函数,用于计算(MySql)查询循环中返回null的单个行,php,mysql,Php,Mysql,我想在查询循环中包含一个php函数,它只输出表中的所有行 此函数将返回另一个查询,计算单个用户的行数,并与第一个查询一起编码 该函数可以工作,如果我回显userId变量,我就正确了,但是出于某种原因,count查询返回null 我需要一些帮助,谢谢 <?php include_once 'includes/db_connect.php'; $query = "SELECT * FROM UPLOADS"; //Creating resonse json array, with ano
<?php
include_once 'includes/db_connect.php';
$query = "SELECT * FROM UPLOADS";
//Creating resonse json array, with another array inside
$jsonResponse = array( "info" =>array() );
if($result = mysqli_query($mysqli, $query)) {
while($row = mysqli_fetch_assoc($result)){
$jsonRow = array(
'user' => $row['USER'],
'userId' => $row['USERID'],
'filename' => $row['FILENAME'],
'description' => $row['DESCRIPTION'],
'location' => $row['LOCATION'],
'address' => $row['ADDRESS'],
'likes' => $row['LIKES'],
'city' => $row['CITY'],
'lat' => $row['LAT'],
'lng' => $row['LNG'],
'countPost' => countUserPosts($row['USERID'])
);
//adding the $jsonRow array to the end of the "users" array as key/value
array_push($jsonResponse["info"], $jsonRow);
}
}
//encoding to json for the app
echo json_encode($jsonResponse);
function countUserPosts($userId){
$result = mysqli_query($mysqli, "SELECT count(*) FROM UPLOADS WHERE USERID = '$userId' ");
$row = mysqli_fetch_row($result);
$num = $row[0];
return $num;
}
?>
尝试将mysqli对象插入函数参数中:
function countUserPosts($userId, $mysqli){
// ^ this one so it won't be out of scope.
$result = mysqli_query($mysqli, "SELECT count(*) FROM UPLOADS WHERE USERID = '$userId' ");
$row = mysqli_fetch_row($result);
$num = $row[0];
return $num;
}
首先,我猜and ID是一个整数,整数不需要介于“”之间,其次,如果你回显你的查询并将其粘贴到你的mysql中,会返回null吗?@EdmondTamas是的,你需要作用域上的连接。我很高兴这有帮助