php create lock file

PHP File processing advanced application-file pointer php can implement the positioning of the file pointer and query, so as to achieve the required information fast query, the file pointer function has rewind (), fseek (), feof () and Ftell ()

File lockThe name is advisory file lock, which is mentioned in the book. This type of lock is more common, such as MySQL, PHP-FPM Boot will have a PID file records the process ID, this file is a file lock. This lock prevents a process from running

A large number of files need to be processed. Using a php process will be slow. How to lock a file when a process reads a file. Do not allow other processes to read and directly skip this step. Do you want to continue reading other processes? Rename

Php file lock (convert) bool flock (int handle, int operation [, int & wouldblock]); The handle of the flock () operation must be an opened file pointer. Operation can be one of the following values: To obtain a shared Lock (read program), set

The role of the composer. lock file and the role of composer. lock. Composer. the role of the lock file, composer. the role of lock is the basic use of Composer in the project. json uses composer in the project. you need a composer. json file, this

Bool flock (int handle, int operation [, int & wouldblock]);The handle of the flock () operation must be an opened file pointer. Operation can be one of the following values:1. To obtain the shared Lock (read program), set operation to LOCK_SH (PHP 4

In view of the previous introduction of the Swoole, the Swoole server/client and the multi-process mechanism are used to describe the lock. This article mainly introduces the PHP file lock and Process lock Use example, here only for the PHP lock

A distributed lock is a very useful primitive in many environments, and it is the only way to share resources between mutually exclusive operations of a process. There are a number of development libraries and blogs that describe how to implement

Often in the shell script to block other processes, such as MSMTP mail queue script, this script mutex is not correct, the following is the three found in the file to achieve mutual exclusion of the correct approach. 1. The Flock of Util-linux

In PHP, the file lock and mysql table lock have the approximate usage, that is, only one person can operate at the same time, which avoids the operation of the same file by multiple people at the same time, this will cause data loss. Next I will