PHP Alphabet table - A to Z, Z to A
Question
I'm trying to do a script in PHP which will generate a table with vertical alphabet in it. It will simply echo letters from A to Z and then from Z back to A, when it comes to A it will do again from A to Z and from Z to A.
My code until now is only from A to Z and then again from A to Z.
<!DOCTYPE html>
<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>Vertikální abeceda</title>
</head>
<body>
<form method="post">
<input type="number" placeholder="SLOUPCE" name="sloupce" />
<input type="number" placeholder="ŘÁDKY" name="radky" />
<input type="submit" value="Vytvořit tabulku" /><br><br>
</form>
<?php
if(isset($_POST['radky']) && isset($_POST['sloupce'])) {
$col = $_POST['sloupce'];
$row = $_POST['radky'];
$cislo = 0;
echo ("<table rules='all'>");
for($i = 1; $i<=$row; $i++) {
echo ("<tr>");
for($c = 0; $c<$col; $c++) {
$pismeno_id = 64;
$cislo = $i + ($c*$row);
$pismeno = $cislo + $pismeno_id;
while($pismeno > 90) {
$pismeno = $pismeno - 26;
}
echo ("<td>". "&#" . $pismeno . "</td>");
}
echo ("</tr>");
}
echo ("</table>");
}
?>
</body>
</html>
1 answers
solution1
1 ACCPTED 2015-03-30 18:19:01
Here we go: To add the backwards alphabet to the cicle I changed the maximum number of $letter to 115. Thats 65(value of A) + 26(full alphabet) + 24 (X - B).
To accomplish the backwards Alphabet, I added variable $realletter, which remains the same as $letter up to 90. From 91 to 115, it counts backwards, by substracting the amount higher than 90 from 90. That would be 90 - ($letter - 90), ie. for 94 -> 90 - (94 - 90) = 90 - 4 = 86.
<?php
$row = 26;
$col = 26;
echo ("<table rules='all'>");
for($i = 0; $i<=$row; $i++) {
echo ("<tr>");
for($c = 0; $c<$col; $c++) {
$letter_id = 65;
$number = $i + ($c*$row);
$letter = $number + $letter_id;
while($letter > 115) {
$letter = $letter - 50;
}
if($letter > 90){
$realletter = 90 - ($letter-90);
}else{
$realletter = $letter;
}
echo ("<td>". "&#" . $realletter. "</td>");
}
echo ("</tr>");
}
echo ("</table>");
?>
Hope that helps!
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.