(PHP 4 >= 4.1.0, PHP 5, PHP 7)
Runs the select() system call on the given arrays of sockets with a specified timeout
int socket_select ( array &$read, array &$write, array &$except, int $tv_sec [, int $tv_usec = 0 ] )
socket_select() accepts arrays of sockets and waits for them to change status. Those coming with BSD sockets background will recognize that those socket resource arrays are in fact the so-called