简单实用socket

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@socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO,array("sec"=>10, "usec"=>0));当socket_read得不到响应，这里设置时间可以跳过不会陷入死循环
* g4 q* B; F8 s4 D7 L3 s; i5 E现在socket读写数据的流程是这样的：
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' n- P# l) g1 }: Y1 O/ }1 b$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
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' |, G; \2 L/ r, F4 ]6 M3 n* u2 wsocket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO,array("sec"=>60, "usec"=>0 ) );

7 M" |% T! p& {. |* p( Ysocket_connect($socket, IP, PORT);
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socket_write($socket, $strxml, strlen($strxml);
$back = socket_read($socket, 8192);

& D: R6 ~3 d) A/ x( p6 E  ysocket_read有时候收不到返回数据，应该是超时了，如何修改超时时间？
socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO,array("sec"=>3, "usec"=>0));//接受超时
socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO,array("sec"=>2, "usec"=>0));//发送超时
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  a3 i; `& V  `* \https://blog.csdn.net/sn_qmzm521/article/details/80756396
https://blog.csdn.net/Hiking_Tsang/article/details/84788448
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