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php中的socket编程
作者:admin 日期:2011-07-16
一般不需要采集什么的话，php中不大需要直接操作socket函数的！如果是平常的采集也不需要用到socket函数。像file_get_contents这个函数就足以了。并且有些虚拟主机是关闭socket的。所以总的来说，socket在php中并不常见。但是如果你想要做一些特殊的事情，比如你采集的页面需要来路，需要cookie，或者你需要连接ftp来下载文件，那就需要socket函数了。下面就简单的介绍一下socket在php中的使用。
socket函数目录：
socket_bind -- Binds a name to a socket
socket_clear_error -- Clears the error on the socket or the last error code
socket_close -- Closes a socket resource
socket_connect -- Initiates a connection on a socket
socket_create_listen -- Opens a socket on port to accept connections
socket_create_pair -- Creates a pair of indistinguishable sockets and stores them in an array
socket_create -- Create a socket (endpoint for communication)
socket_get_option -- Gets socket options for the socket
socket_getpeername -- Queries the remote side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type
socket_getsockname -- Queries the local side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type
socket_last_error -- Returns the last error on the socket
socket_listen -- Listens for a connection on a socket
socket_read -- Reads a maximum of length bytes from a socket
socket_recv -- Receives data from a connected socket
socket_recvfrom -- Receives data from a socket, connected or not
socket_select -- Runs the select() system call on the given arrays of sockets with a specified timeout
socket_send -- Sends data to a connected socket
socket_sendto -- Sends a message to a socket, whether it is connected or not
socket_set_block -- Sets blocking mode on a socket resource
socket_set_nonblock -- Sets nonblocking mode for file descriptor fd
socket_set_option -- Sets socket options for the socket
socket_shutdown -- Shuts down a socket for receiving, sending, or both
socket_strerror -- Return a string describing a socket error
socket_write -- Write to a socket
上面列出的就是php中所有的socket函数。可能还有其它的函数，有这些就足够了。
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