(PECL sync >= 1.1.0)
SyncSharedMemory::write — Copy data to named shared memory
$string = ?
, int $start = 0
)Copies data to named shared memory.
stringThe data to write to shared memory.
Note:
If the size of the data exceeds the size of the shared memory, the number of bytes written returned will be less than the length of the input.
startThe start/offset, in bytes, to begin writing.
Note:
If the value is negative, the starting position will begin at the specified number of bytes from the end of the shared memory segment.
An integer containing the number of bytes written to shared memory.
Example #1 SyncSharedMemory::write() example
<?php
// You will probably need to protect shared memory with other synchronization objects.
// Shared memory goes away when the last reference to it disappears.
$mem = new SyncSharedMemory("AppReportName", 1024);
if ($mem->first())
{
// Do first time initialization work here.
}
$result = $mem->write("report.txt");
var_dump($result);
$result = $mem->write("report.txt", -3);
var_dump($result);
?>
以上例程的输出类似于：
int(10) int(3)