A method of implementing TCP port detection in PHP

This article illustrates the method of implementing TCP port detection in PHP. Share to everyone for your reference. Specifically as follows:

The program can confirm that the current port is available:

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<?php class Health {public static $status; public function __construct () {} Public function check ($IP, $port) {$sock = Socket_create (Af_inet, Sock_stream, sol_tcp); Socket_set_nonblock ($sock); Socket_connect ($sock, $ip, $port); Socket_set_block ($sock); Self:: $status = socket_select ($r = Array ($sock), $w = Array ($sock), $f = Array ($sock), 5); Return (self:: $status); Public Function Checklist ($LST) {} public Function status () {switch (self:: $status) {case 2:echo "closedn"; 1:echo "OPENNINGN"; Break Case 0:echo "TIMEOUTN"; Break }} $ip = ' 192.168.2.10 '; $port = 80; $health = new Health (); $health->check ($ip, $port); $health->status ();