SplFileObject
PHP Manual

SplFileObject::flock

(PHP 5 >= 5.1.0, PHP 7)

SplFileObject::flockPortable file locking

Descrição

public bool SplFileObject::flock ( int $operation [, int &$wouldblock ] )

Locks or unlocks the file in the same portable way as flock().

Parâmetros

operation

operation is one of the following:

  • LOCK_SH to acquire a shared lock (reader).
  • LOCK_EX to acquire an exclusive lock (writer).
  • LOCK_UN to release a lock (shared or exclusive).
  • LOCK_NB to not block while locking (not supported on Windows).

wouldblock

Set to TRUE if the lock would block (EWOULDBLOCK errno condition).

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha.

Exemplos

Exemplo #1 SplFileObject::flock() example

<?php
$file 
= new SplFileObject("/tmp/lock.txt""w");
if (
$file->flock(LOCK_EX)) { // do an exclusive lock
    
$file->ftruncate(0);     // truncate file
    
$file->fwrite("Write something here\n");
    
$file->flock(LOCK_UN);   // release the lock    
} else {
    echo 
"Couldn't get the lock!";
}
?>

Veja Também


SplFileObject
PHP Manual