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socket_write

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

socket_write — Write to a socket

Опис

socket_write(Socket $socket, string $data, ?int $length = null): int|false

The function socket_write() writes to the socket from the given data.

Параметри

socket

data

The buffer to be written.

length

The optional parameter length can specify an alternate length of bytes written to the socket. If this length is greater than data's length, it is silently truncated to the length of data.

Значення, що повертаються

Returns the number of bytes successfully written to the socket або false в разі помилки. The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual explanation of the error.

Зауваження:

It is perfectly valid for socket_write() to return zero which means no bytes have been written. Be sure to use the === operator to check for false in case of an error.

Журнал змін

Версія Опис
8.0.0 Тепер socket є примірником Socket; раніше це був resource.
8.0.0 length is nullable now.

Примітки

Зауваження:

socket_write() does not necessarily write all bytes from data. It's valid that, depending on the network buffers etc., only a certain amount of data, even one byte, is written despite data being longer. A loop must be used to ensure that the rest of data is transmitted.

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