lPushx

PHP Redis

lPushx

Description

Adds the string value to the head (left) of the list if the list exists.

添加一个VALUE到LIST容器的顶部(左侧)如果这个LIST存在的话。

Parameters

key
value String, value to push in key

Return value

LONG The new length of the list in case of success, FALSE in case of Failure.

如果ADD成功, 返回LIST容器最新的长度。失败则返回FALSE

Examples
$redis->delete('key1');
$redis->lPushx('key1', 'A'); // returns 0
$redis->lPush('key1', 'A'); // returns 1
$redis->lPushx('key1', 'B'); // returns 2
$redis->lPushx('key1', 'C'); // returns 3
/* key1 now points to the following list: [ 'A', 'B', 'C' ] */