Send TCP packet in PHP - php

Question

I tried to send a TCP packed data to a some ip with php , i used the code below to send it :
$socket=socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//$bind=socket_bind($socket,'tcp://94.232.171.102');
socket_connect($socket, 'xx.xx.xx.xx', 9001);
$buff='P\00\00\00\e5G\1f\b9\c6\acB\84\15\e7\b3*\17\ab\00G2\n\9c\ba{\a9}\dab"\c31\ed\f7\94\fc\aeX\ab\13\r/\02\ce\83f\bc?\96q\10M\b0\f4\a0\b1\95X\d0\85\10\df$|\de$\b4\f6m\a9\ff%Z\b4\d8\aa\da\bb';
$length = strlen($buff);
$sent = socket_write($socket, $buff, $length);
But, however, it doesnt work and doesnt sent , when i use some windows application like Packet Sender for that setting it's send packet correctly , why i cant send it from php on localhost

Answer 1

With at least some error handling you have a better chance of finding the error.
ini_set('display_errors', true); error_reporting(E_ALL); // <- for debugging purposes only
$socket=socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ( !$socket ) {
$errno = socket_last_error();
$error = sprintf('%s (%d)', socket_strerror($errno), $errno);
trigger_error($error, E_USER_ERROR);
}
if ( !socket_connect($socket, 'xx.xx.xx.xx', 9001) ) {
$errno = socket_last_error($socket);
$error = sprintf('%s (%d)', socket_strerror($errno), $errno);
trigger_error($error, E_USER_ERROR);
}
$buff='P\00\00\00\e5G\1f\b9\c6\acB\84\15\e7\b3*\17\ab\00G2\n\9c\ba{\a9}\dab"\c31\ed\f7\94\fc\aeX\ab\13\r/\02\ce\83f\bc?\96q\10M\b0\f4\a0\b1\95X\d0\85\10\df$|\de$\b4\f6m\a9\ff%Z\b4\d8\aa\da\bb';
$length = strlen($buff);
$sent = socket_write($socket, $buff, $length);
if ( FALSE===$sent ) {
$errno = socket_last_error($socket);
$error = sprintf('%s (%d)', socket_strerror($errno), $errno);
trigger_error($error, E_USER_ERROR);
}
else if ( $length!==$sent ) {
$msg = sprintf('only %d of %d bytes sent', $length, $sent);
trigger_error($msg, E_USER_NOTICE);
}