SyncSharedMemory::write

(PECL sync >= 1.1.0)

SyncSharedMemory::write — Copy data to named shared memory

说明

public SyncSharedMemory::write ([ string $string [, int $start = 0 ]] )

Copies data to named shared memory.

参数

string: The data to write to shared memoy.

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.
start: The 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.

返回值

An integer containing the number of bytes written to shared memory.

范例

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)

参见

SyncSharedMemory::__construct() - Constructs a new SyncSharedMemory object
SyncSharedMemory::first() - Check to see if the object is the first instance system-wide of named shared memory
SyncSharedMemory::write()
SyncSharedMemory::read() - Copy data from named shared memory