Creating a multiplication table in PHP - php

Question

I'm having a little trouble figuring out why there's an extra "0" box on my multiplication table, and here's the code that I have so far:
$cols = 10;
$rows = 10;
$number = 0;
$number2 = 0;
echo "<table border=\"1\">";
for ($r = 0; $r < $rows; $r++){
echo('<tr>');
if ($r == 0) {
for ($i = 0; $i < $rows; $i++) {
echo('<td>' .$number2++.'</td>');
}
}
for ($c = 0; $c < $cols; $c++){
if ($c == 0) {
echo('<td>' .$number++.'</td>');
} else if ($r != 0) {
echo( '<td>' .$c*$r.'</td>');
}
}
echo('</tr>');
}
echo("</table>");
So far it looks good, but that extra 0 on the first row is bothering me. Also I would like to keep the original format of the multiplication table if possible.

Answer 1

Here is:
$cols = 10;
$rows = 10;
$number = 1;
$number2 = 0;
echo "<table border=\"1\">";
for ($r = 0; $r < $rows; $r++){
echo('<tr>');
if ($r == 0) {
for ($i = 0; $i < $rows; $i++) {
echo('<td>' .$number2++.'</td>');
}
}
for ($c = 0; $c < $cols; $c++){
if ($c == 0 && $r != 0) {
echo('<td>' .$number++.'</td>');
} else if ($r != 0) {
echo( '<td>' .$c*$r.'</td>');
}
}
echo('</tr>');
}
echo("</table>");
You have a progression from 0 to 10. But, in the first td of the second for, you should not start from 0, you need to start from 1, or the 0 will be showed at the end of the first row. It's becase you already started the first row using the if, so the second one will repeat it.
You just need to check if the $r is 0 (to avoid repeat the first row) and start the $number from 1 (to follow the same logic, but starting from 1).

Answer 2

How about this:
$cols = 10;
$rows = 10;
$number = 0;
$number2 = 0;
echo "<table border=\"1\">";
for ($r = 0; $r <= $rows; $r++){
echo('<tr>');
if ($r == 0) {
for ($i = 0; $i < $rows; $i++) {
echo('<th>' .$number2++.'</th>');
}
}
for ($c = 0; $c <= $cols; $c++){
if ($c == 0) {
echo('<th>' .$number++.'</th>');
} else if ($r != 0) {
echo( '<td>' .$c*$r.'</td>');
}
}
echo('</tr>');
}
echo "</table>";