I would like to build a simulation engine which can simulate a soccer (association football) match. It would be cool great if you could help me. What is important to me is to decide which actions happen. The event listeners for each action can be implemented later easily. The function should only simulate the game results and comments to happening actions. There is no 2D/3D graphics needed. We're talking about games like Hattrick.

I would propose that you have an array of minutes with actions at first.

$minutes = array(1, 3, 4, 7, 11, 13, ..., 90, 92);

For each of these minutes, you could then simulate an attack.

The attacking team is determined by dice before: $attacking = mt_rand(1, 2);

So the part which is most important to me is the attack function.

Please edit my approach or use it as a sample. Can you help me to improve this? The function should be complex so that the results are as realistic as possible. But you need to find something between high predictability and too random results. I only want to improve this function.

My approach:

<?php
function Chance_Percent($chance, $universe = 100) {
    $chance = abs(intval($chance));
    $universe = abs(intval($universe));
    if (mt_rand(1, $universe) <= $chance) {
        return true;
    }
    return false;
}
function simulate_attack($teamname_att, $teamname_def, $strength_att, $strength_def) {
    global $minute, $goals, $_POST, $matchReport, $fouls, $yellowCards, $redCards, $offsides, $schuesse, $taktiken;
    // input values: attacker's name, defender's name, attacker's strength array, defender's strength array
    // players' strength values vary from 0.1 to 9.9
    // ADJUSTMENT START
    switch ($taktiken[$teamname_att][0]) {
        case 1: $strength_att['defenders'] *= 1.1; $strength_att['forwards'] *= 0.9; break;
        case 3: $strength_att['de
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