post.php

<?php

// https://raw.githubusercontent.com/rubenmak/PokemonGo-SlackBot/master/locales/pokemon.en.json
$pokemons = json_decode(file_get_contents("pokemon.en.json"), true);
$json     = json_decode(file_get_contents("php://input"));
$poke_id  = $json->{"message"}->{"pokemon_id"};
$gone     = $json->{"message"}->{"disappear_time"};
$poke     = $pokemons[$json->{"message"}->{"pokemon_id"}];
$ignore   = [
19,  // Rattata
20,  // Raticate
];

if (!in_array($poke_id, $ignore)) {
    $data = "payload=" . json_encode(array(
            "channel"       =>  "#pokemon",
            "text"          =>  "$poke ($poke_id) found, until". date("H:i:s", $gone),
            "icon_emoji"    =>  ":smile:"
        ));
    $url = // your slack webhook link here

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $result = curl_exec($ch);
    curl_close($ch);
}
?>