怎样用SetSocketOption函数设置MulticastInterface属性
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发布时间：2022-05-24 18:30
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时间：2023-04-24 04:49
php函数boolsocket_set_option(resource$socket,int$level,int$optname,mixed$optval)用法说明：Thesocket_set_option()functionsetstheoptionspecifiedbytheoptnameparameter,atthespecifiedprotocollevel,tothevaluepointedtobytheoptvalparameterforthesocket。参数说明：socketAvalidsocketresourcecreatedwithsocket_create()orsocket_accept().levelThelevelparameterspecifiestheprotocollevelatwhichtheoptionresides.Forexample,toretrieveoptionsatthesocketlevel,alevelparameterofSOL_SOCKETwouldbeused.Otherlevels,suchasTCP,canbeusedbyspecifyingtheprotocolnumberofthatlevel.Protocolnumberscanbefoundbyusingthegetprotobyname()function.optnameTheavailablesocketoptionsarethesameasthoseforthesocket_get_option()function.optvalTheoptionvalue.返回值：成功时返回TRUE，或者在失败时返回FALSE。例子：
