php lock file for writing

PHP program in the file lock, mutex, read and write the use of skills analysis, File lockFull name advisory file lock, which is mentioned in the book. This type of lock is more common, such as MySQL, after php-fpm boot, there will be a PID 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 ()

This article mainly introduced the PHP program in the file lock, mutual exclusion lock, read-write lock using skills analysis, which focuses on the Sync module and pthreads module use examples, the need for friends can refer to. We hope to help you.

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

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

Example of PHP file lock-based multi-process reading/writing a file at the same time, This example describes how PHP solves the problem of multiple processes simultaneously reading and writing a file based on the file lock. We will share this with

How to use php file locks? Php file lock tutorial $ File = "temp.txt "; $ Fp = fopen ($ file, 'w '); If (flock ($ fp, LOCK_EX )){ Fwrite ($ fp, "abc \ n "); Sleep (10 ); Fwrite ($ fp, "123 \ n ");

$file = "Temp.txt"; $fp = fopen ($file, ' w '); if (Flock ($FP, lock_ex)) { Fwrite ($fp, "abc\n"); Sleep (10); Fwrite ($fp, "123\n"); Flock ($FP, lock_un); } Fclose ($FP);

Read-Write related problems are always there, file lock is to solve this problem and do, in fact, it is a simple signal volume. Read-write correlation refers to the random conflict of file data caused by both reading and writing files. In order to

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