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Php streams.php stream sock open host () function

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php_stream_sock_open_host -- Open a connection to a host and return a stream


php_stream * php_stream_sock_open_host ( const char * host, unsigned short port, int socktype, struct timeval * timeout, int persistent )

php_stream_sock_open_host() establishes a connect to the specified host and port. socktype specifies the connection semantics that should apply to the connection. Values for socktype are system dependent, but will usually include (at a minimum) SOCK_STREAM for sequenced, reliable, two-way connection based streams (TCP), or SOCK_DGRAM for connectionless, unreliable messages of a fixed maximum length (UDP).

persistent is a flag the controls whether the stream is opened as a persistent stream. Generally speaking, this parameter will usually be 0.

If not NULL, timeout specifies a maximum time to allow for the connection to be made. If the connection attempt takes longer than the timeout value, the connection attempt is aborted and NULL is returned to indicate that the stream could not be opened.

Note: The timeout value does not include the time taken to perform a DNS lookup. The reason for this is because there is no portable way to implement a non-blocking DNS lookup.

The timeout only applies to the connection phase; if you need to set timeouts for subsequent read or write operations, you should use php_stream_sock_set_timeout() to configure the timeout duration for your stream once it has been opened.

The streams API places no restrictions on the values you use for socktype, but encourages you to consider the portability of values you choose before you release your extension.

Php streams.php stream sock open host Function syntax tag

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Php streams.php stream sock open host syntax tutorial

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