A simple lottery test prototype-PHP Tutorial-php.cn

A simple lottery test prototype

WBOY

Release： 2016-07-25 09:05:10

Original

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Business needs, so I made a simple prototype test. The main requirement of the function is: the higher the amount in the user account, the greater the chance of winning the prize.
This script can only be used from the command line, usage example:
php lucky.php 100

/**
* Lottery program
*
* @File: lucky.php
* @Author: zzxworld
* @Email: zzxworld@gmail.com
* @Date: 2012-05-09
*/
$timer = microtime(true);
/**Manually configured parameters **/
# Prize pool size
$lucky_size = 1000;
# highest The winning probability of the user cannot exceed the prize pool size
$star_user_rate = 100;
# First prize bonus
$lucky_first = 100;
# Second prize bonus
$lucky_second = 50;
# Third prize bonus
$lucky_third = 25;
# Maximum normal prize amount
$lucky_normal_max = 10;
# Minimum normal prize amount
$lucky_normal_min = 1;
/**Parameters that automatically take values from the system **/
# Total bonus amount
$lucky_amount = 578;
# Owned The account amount of the user with the most assets
$star_user_amount = 134;
# Current user amount
$user_amount = isset($argv[1]) ? intval($argv[1]) : 0;
if ($user_amount < 1) {
die('Please set a user amount after the command.' . chr(10));
}
# Calculate the current user's probability of winning
$user_rate = $star_user_rate/$lucky_size/$star_user_amount*$user_amount;
# Calculate the number of bonuses based on the probability of winning
$lucky_num = intval($user_rate * $lucky_size);
# Initialize the prize pool
$lucky_pool = array_fill(0, $lucky_size, 0);
# The probability of winning is less than 1 Adjust to 1
if ($lucky_num < 1) {
$lucky_num = 1;
}
# Arrange the prizes in the prize pool
$lucky_items = array('first', 'second', 'third', 'normal' );
$lucky_num += 3;
# Remove the first, second and third prizes according to the total prize money
if ($lucky_amount < $lucky_first) {
$lucky_num -= 1;
unset($lucky_items['first' ]);
}
if ($lucky_amount < $lucky_second) {
$lucky_num -= 1;
unset($lucky_items['second']);
}
if ($lucky_amount < $lucky_third) {
$lucky_num -= 1;
unset($lucky_items['third']);
}
# Randomly generate prizes in the prize pool
foreach(array_rand($lucky_pool, $lucky_num) as $key) {
$name = $lucky_items[array_rand($lucky_items)];
if (!isset($create_lucky_first) && $name == 'first') {
$lucky_pool[$key] = $lucky_first;
$create_lucky_first = true;
continue;
}
if (!isset($create_lucky_second) && $name == 'second') {
$lucky_pool[$key] = $lucky_second;
$create_lucky_second = true;
continue;
}
if (!isset( $create_lucky_third) && $name == 'third') {
$lucky_pool[$key] = $lucky_third;
$create_lucky_third = true;
continue;
}
if ($name == 'normal') {
$ lucky_pool[$key] = rand($lucky_normal_min, $lucky_normal_max);
}
}
# Lottery
$result = $lucky_pool[rand(0, $lucky_size)];
echo 'Prize pool size:' . $ lucky_size . chr(10);
echo 'Total bonus amount:' . $lucky_amount . chr(10);
echo 'First prize bonus:' . $lucky_first . chr(10);
echo 'Second prize bonus: ' . $lucky_second . chr(10);
echo 'Third prize bonus:' . $lucky_third . chr(10);
echo 'Normal prize bonus:' . $lucky_normal_min . ' - ' . $lucky_normal_max . chr(10 );
echo 'Total amount of funds for star users:' . $star_user_amount . chr(10);
echo 'Probability of winning for star users:' . ($star_user_rate/$lucky_size) . chr(10) . chr(10);
echo 'Current user's total funds:' . $user_amount . chr(10);
echo 'Current user's probability of winning:' . $user_rate . chr(10);
echo 'Current user's prize pool:';
foreach( $lucky_items as $name) {
switch($name) {
case 'first':
echo 'First Prize (1),';
$lucky_num--;
break;
case 'second':
echo ' Second Prize(1),';
$lucky_num--;
break;
case 'third':
echo 'Third Prize(1),';
$lucky_num--;
break;
case 'normal' :
echo 'Common prize(' . $lucky_num . ')';
break;
}
}
echo chr(10);
echo 'Current user lottery result:';
if ($result == $lucky_first) {
echo 'First Prize' . $result . 'Yuan';
} elseif($result == $lucky_second) {
echo 'Second Prize' . $result . 'Yuan';
} elseif($result = = $lucky_third) {
echo 'Third Prize' . $result . 'Yuan';
} elseif($result >= $lucky_normal_min && $result <= $lucky_normal_max) {
echo 'Normal Prize' . $result . 'yuan';
} else {
echo 'No prize won';
}
echo chr(10);
echo chr(10);
echo 'Execution time:' . (microtime(true) - $timer ) . 'Seconds' . chr(10);

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