php文件锁实例

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<?php
namespace AppTools;
use Log;
use Exception;
//command 文件锁  command执行完毕会释放
class CmdLock
{
    public function __construct($called_class)
    {
        $lanmao_lock_path                   = sys_get_temp_dir() . '/lanmao_lock';
        if (!is_dir($lanmao_lock_path)) {
            mkdir($lanmao_lock_path);
        }
        $this->called_class         = $called_class;
        $class_info                 = explode('\', $called_class);
        $this->class                = end($class_info);
        $this->lockname             = $this->class . '.lock';
        $this->lock_path            = $lanmao_lock_path . '/';
        $this->lock_realpath        = $this->lock_path . $this->lockname;
        $this->lock                 = fopen($this->lock_realpath, 'w+');
    }
    public function lock()
    {
        $date = date("Ymd H:i:s", time(null));
        $msg  = "command: {$this->class} ========> 准备加锁";
        Log::info($msg);
        if (flock($this->lock, LOCK_EX | LOCK_NB)) {
            Log::info("command: {$this->class} ========> 锁定...");
            return true;
        }
        throw new Exception('加锁失败!  ===>  ' . $this->called_class);
    }
    public function unlock()
    {
        $msg = "command: {$this->class} ========> 准备释放锁";
        Log::info($msg);
        flock($this->lock, LOCK_UN);
        fclose($this->lock);
    }
}