存在密钥时phpredis rpop返回false

我正在构建一个使用redis的游戏应用程序，这是我的php脚本

<?php
//melon game pop

//connect to redis db
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);


//receive the data as json
//$data = json_decode(file_get_contents('php://input'), true);
$data = null;


//decided to just grab the string
$key = file_get_contents('php://input');

//Shotgun debugging in action
$my_key = trim($key);

/*
 was originally sending json on reading into variables from array decided to simplify until my issue is resolved
//parse my data in to separate variables  
if ($data != null) {
$key = $data['key'];
//$value = $data['value'];  

//$key = utf8_decode($key);        
}
else
{
print "It's not recognizing your data!";
}
*/




$my_echo = $redis->rpop($my_key);

 //it returns false if the key doesn't exist, but i've shown that it clearly exists so  why is it returning false???

if ($my_echo == false) {

print $my_key;
//print '5'.$key;

//print "5failure";

}
else
{
print $my_echo;
}
?>

当我弹出“my_control”时，我从一个客户端获取{“key”：“\nubuntureft22”}，然后使用浏览器从另一个客户端获取ubunturight22。当我从命令行手动弹出时，我得到以下信息：

redis-cli
127.0.0.1:6379> rpop my_control
"ubunturight22"
127.0.0.1:6379> rpop my_control
"{ \"key\": \"\\nubuntuleft23\" }"
127.0.0.1:6379> rpop "my_control"
"ubunturight23"
127.0.0.1:6379

---

尝试var_dump（$my_echo）并检查键是否正确？我在$my_echo和$my_键上使用了var_dump，结果是：bool（false）字符串（13）“ubunturight20”，这正是我所期望的。除了双引号，但我猜这一定是var_dump（）的函数？试试var_dump（$redis->keys（“*”）；在rpop之前，如果密钥是exits或notYes，则在按照指示执行操作时，我的密钥似乎不可见。

redis-cli
127.0.0.1:6379> rpop my_control
"ubunturight22"
127.0.0.1:6379> rpop my_control
"{ \"key\": \"\\nubuntuleft23\" }"
127.0.0.1:6379> rpop "my_control"
"ubunturight23"
127.0.0.1:6379