Counting Numbers And Sorting Them
Question
I have a question. I have created a small script which generates 37 random numbers between 0 and 36 but I want to expand it a little.
This is what I have:
<!DOCTYPE html>
<html>
<body>
<?php
for ($x = 1; $x <= 37; $x++) {
echo(mt_rand(0,36) . "<br>");
}
?>
</body>
</html>
I want to show a horizontal row of number 0 to 36 and below that I want to show how many times a number show from the previous random generator code.
Can someone help me here?
3 answers
solution1
0 2017-12-15 01:59:52
You can create an array and save the result on it.
Code
You can use array_count_values
$random_numbers = array();
echo 'Random Numbers: ';
for ($x = 1; $x <= 37; $x++) {
$random_numbers[] = mt_rand(0,36);
}
print_r(array_count_values($random_numbers));
OUTPUT
Array
(
[21] => 1
[22] => 1
[15] => 1
[6] => 2
[13] => 2
[24] => 2
[35] => 3
[0] => 1
[3] => 2
[32] => 1
[19] => 2
[9] => 2
[28] => 2
[29] => 1
[33] => 1
[11] => 1
[2] => 3
[25] => 1
[10] => 2
[4] => 1
[30] => 1
[20] => 1
[27] => 1
[26] => 1
[12] => 1
)
solution2
0 ACCPTED 2017-12-15 02:21:32
Try this:
<!DOCTYPE html>
<html>
<body>
<?php
$numberOfSpins = 10000;
$numberArray = array();
// Start table
echo '<table>
<tr>';
// print out the table headers
for ($x = 0; $x < 37; $x++) echo '<th style="font-weight:bold; color:#09f;">'.$x.'</th>';
// Fill $numberArray with random numbers
for($i=0; $i < $numberOfSpins; $i++) array_push($numberArray, mt_rand(0,36));
echo '</tr>
<tr>';
// Count value frequency using PHP function array_count_value()
$resultArray = array_count_values($numberArray);
// Start from 0 since you are generating numbers from 0 to 36
for($i=0; $i < 37; $i++)
{
// array_count_values() returns an associative array (the key of
// each array item is the value it was counting and the value is the
// occurrence count; [key]->value).
if (isset($resultArray[$i])) echo '<td>'.$resultArray[$i].'</td>';
else echo '<td>0</td>';
}
echo '</tr>
</table>';
?>
</body>
</html>
solution3
-1 2017-12-15 02:00:26
You can use a variable to store the values and then use array_keys to display the column number and arrays_values to print the values. The latter is optional.
<?php
$numbers = [];
for($x = 1; $x <= 10; $x++) {
$numbers[$x] = mt_rand(0,36);
}
echo implode("\t | \t", array_keys($numbers));
echo PHP_EOL;
echo implode("\t | \t", $numbers);
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