PHP socket 编程中的超时设置.网上找了半天也没找到。贴出来分享之：
设置$socket 发送超时1秒，接收超时3秒：
$socket = socket_create(AF_INET,SOCK_STREAM,SOL_TCP);
socket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO,array("sec"=>1, "usec"=>0 ) );
socket_set_option($socket,SOL_SOCKET,SO_SNDTIMEO,array("sec"=>3, "usec"=>0 ) );
English:
SO_RCVTIMEO Reports the timeout value for input operations. array. The array will contain two keys: sec which is the seconds part on the timeout value and usec which is the microsecond part of the timeout value.
SO_SNDTIMEO Reports the timeout value specifying the amount of time that an output function blocks because flow control prevents data from being sent. array. The array will contain two keys: sec which is the seconds part on the timeout value and usec which is the microsecond part of the timeout value.
设置$socket 发送超时1秒，接收超时3秒：
$socket = socket_create(AF_INET,SOCK_STREAM,SOL_TCP);
socket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO,array("sec"=>1, "usec"=>0 ) );
socket_set_option($socket,SOL_SOCKET,SO_SNDTIMEO,array("sec"=>3, "usec"=>0 ) );
English:
SO_RCVTIMEO Reports the timeout value for input operations. array. The array will contain two keys: sec which is the seconds part on the timeout value and usec which is the microsecond part of the timeout value.
SO_SNDTIMEO Reports the timeout value specifying the amount of time that an output function blocks because flow control prevents data from being sent. array. The array will contain two keys: sec which is the seconds part on the timeout value and usec which is the microsecond part of the timeout value.
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