I've been trying to create a project. When the user clicks <a href> to do download the function should read the file txt and show a line in random mode (with probability of leaving line 1, 2, 3 , 19, etc.).
If you leave line 1 of the file txt , the user "won", if other lines appear without being 1, echo "perdeu" .
It is a genre of random text . You can either.
How do I do something like this?
To get all the lines of the file (file), use the file function:
$lines = file("arquivo.txt");
To randomly sort a line, use the array_rand function:
$randomLine = array_rand($lines);
To check if this is the first line, just compare with the first line in $lines :
if ($randomLine == $lines[0]) {
echo $randomLine;
} else {
echo "Perdeu!";
}
First open the file, in an array:
$texto = file('arquivo.txt');
To adjust the probability, just say what they are.
$probabilidade = [
0 => 10,
1 => 50,
2 => 35,
3 => 5
];
In this case the index is the line and in sequence its probability.
Then it generates a random number (in this case using CSPRNG):
$aleatorio = random_int(1, array_sum($probabilidade));
So now based on% set% we will know what minimum and maximum numbers for each, if it is the message will be shown.
$ultimo = 0;
foreach ($probabilidade as $key => $porcento) {
if ($aleatorio >= $ultimo + 1
&& $aleatorio <= $ultimo + $porcento
) {
echo $texto[$key];
}
$ultimo = $ultimo + $porcento;
}
This will cause if $probabilidade is ...
$aleatorio to 1 will be the 10 line. 0 to 11 will be the 60 line. 1 to 61 will be the 95 line. 2 to 96 will be the 100 line. Obviously the chance of being between 3 to 11 is higher, so the 95 message and 1 message are shown more frequently, than 2 and 0 messages.