我最近将fom php 5.2升级到5.6,并且有一些代码我无法修复：

//Finds users with the same ip- or email-address

function find_related_users($user_id) {

global $pdo;

//print_R($pdo);

//Let SQL do the magic!

$sth = $pdo->prepare('CALL find_related_users(?)');

$sth->execute(array($user_id));

//print_R($sth);

//Contains references to all users by id, to check if a user has already been processed

$users_by_id = array();

//Contains arrays of references to users by depth

$users_by_depth = array();

while ($row = $sth->fetchObject()) {

//Create array for current depth, if not present

if (!isset($users_by_depth[$row->depth]))

$users_by_depth[$row->depth] = array();

//If the user is new

if (!isset($users_by_id[$row->id])) {

//Create user array

$user = array(

'id' => $row->id,

'name' => $row->name,

'email' => $row->email,

'depth' => $row->depth,

'adverts' => array()

);

//Add all users to depth array

@array_push($users_by_depth[$row->depth], &$user);

//Add references to all users to id array (necessary to check if the id has already been processed)

$users_by_id[$row->id] = &$user;

}

//If user already exists

else

$user = &$users_by_id[$row->id];

//Add advert to user

if ($row->advert_id != null)

array_push($user['adverts'], array(

'id' => $row->advert_id,

'title' => $row->advert_title,

'msgs' => $row->msgs,

'url' => $row->url

));

#print_r($user);

//Unset $user variable !!!

//If this is missing, all references in the array point to the same user

unset($user);

}

//Return users, grouped by depth

return $users_by_depth;

}

如果仅删除美元符号前的与号,该功能将停止按预期工作.从关于stackoverflow的其他问题中,我发现这是通过引用进行的调用,对于新的php版本,它将停止.但是我找不到解决方案.

感谢您对如何为php 5.6.x更新此代码的任何帮助

解决方法:

您的代码可能永远无法正常工作,因为您正在抑制array_push()调用中的错误.请注意,只有array_push()的第一个参数通过引用传递,其他值始终按值传递.

您应该删除错误抑制器@(切勿在自己的代码中使用它),在这种情况下,您还可以执行以下操作：

$users_by_depth[$row->depth][] = &$user;

^^ add an element just like `array_push`

现在,您在$users_by_depth中的新值将包含对$user变量的引用.

标签：variables,reference,php

来源： https://codeday.me/bug/20191120/2041320.html