PHP script for sending location APRS message to APRS-IS.

aprslocsend.php

#!/usr/bin/php5
<?php
    $aprs_callsign = '';
    $aprs_passcode = 0;
    $aprs_altinfeet = 2080;
    // W is the WX icon. See http://wa8lmf.net/aprs/APRS_symbols.htm
    // Use GPS coordinate format, see http://www.csgnetwork.com/gpscoordconv.html
    $aprs_coord = '4740.55N/01829.60EW';
    $aprs_comment = 'Gerecse WX - www.ha5kdr.hu';

    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    if ($socket) {
        $result = socket_connect($socket, 'hun.aprs2.net', 14580);
        if ($result) {
            // Authenticating
            $tosend = "user $aprs_callsign pass $aprs_passcode\n";
            socket_write($socket, $tosend, strlen($tosend));
            $authstartat = time();
            $authenticated = false;
            while ($msgin = socket_read($socket, 1000, PHP_NORMAL_READ)) {
                if (strpos($msgin, "$aprs_callsign verified") !== FALSE) {
                    $authenticated = true;
                    break;
                }
                // Timeout handling
                if (time()-$authstartat > 5)
                    break;
            }
            if ($authenticated) {
                // Sending position
                $tosend = "$aprs_callsign>APRS,TCPIP*:@" . date('Hmi') . "z$aprs_coord/A=" .
                    str_pad($aprs_altinfeet, 6, '0', STR_PAD_LEFT) . " $aprs_comment\n";
                socket_write($socket, $tosend, strlen($tosend));
                echo $tosend;
            }
        }
        socket_close($socket);
    }
?>

Please note that date('Hmi') is incorrect. This is hours, month, seconds. It should be date('His') for hours, minutes, seconds.

Just used your code (modified for my needs) to send my WX station data to the APRS server. Thanks for posting this for other to use. I'll add a link to my code once it's ready to publish.

My revised code used to transmit weather data.

const APRS_CALLSIGN = "your callsign";
const APRS_PASSCODE = "your passcode";
const APRS_COORD = "2801.61N/08037.90W"; // example lat/lon
const APRS_COMMENT = "DLDesigns";
const APRS_URL = "noam.aprs2.net"; // change to match your location's most suitable APRS server
const APRS_SOCKET = 14580;

$socket = socket_create( AF_INET, SOCK_STREAM, SOL_TCP) ;

if ( $socket )
{
    $result = socket_connect( $socket, APRS_URL, APRS_SOCKET );

    if ( $result )
    {
        // Authenticating
        $tosend = "user " . APRS_CALLSIGN . " pass " . APRS_PASSCODE . "\n";

        socket_write( $socket, $tosend, strlen( $tosend ) );

        $authstartat = time();

        $authenticated = false;

        while ( $msgin = socket_read( $socket, 1000, PHP_NORMAL_READ ) )
        {
            if ( strpos( $msgin, APRS_CALLSIGN . " verified" ) !== FALSE )
            {
                $authenticated = true;

                break;
            }
            // Timeout handling
            if ( time() - $authstartat > 5 )
                break;
        }

        if ( $authenticated )
        {
            $tosend = APRS_CALLSIGN . ">APRS,TCPIP*:!" . APRS_COORD . "_000/000g000t" . sendTemp() .
            "r000p000P000h" . sendHumd() . "b" . sendPress() . APRS_COMMENT . "\n";

            socket_write( $socket, $tosend, strlen( $tosend ) );

            echo "<br><br>". "<b>Data sent to APRS Server is: </b>" . $tosend . "<br><br>";
        }
    }

    socket_close( $socket );

function sendTemp()
{
global $value1;

$temp_str = sprintf( "%03d", (int) ( 1.8 * $value1 + 32.0 + 0.5 ) );

return $temp_str;

}

function sendHumd()
{
global $value2;

$humd_str = sprintf( "%02d", (int) ( $value2 + 0.5 ) );

return $humd_str;

}

function sendPress()
{
global $value3;

$press_str = sprintf( "%05d", (int) ( $value3 * 10 ) );

return $press_str;

}