php const ROWS 10 numbers array for ROWS if numbers str_repeat ROWS fo

<?php
const ROWS = 10;
$s = '';
$numbers = array();

for ($i = 0; $i < ROWS; ++$i) {
    if($i == 0)
        $numbers[] = str_repeat('1', ROWS);
    for ($j = 0; $j < ROWS; ++$j)
        $s .= ($j == $i) ? '2' : '1';
    $numbers[] = $s;
    $s = '';
}

for ($i = 0; $i < ROWS; ++$i) {
    if($i == 0)
        $numbers[] = str_repeat('2', ROWS);
    for ($j = 0; $j < ROWS; ++$j)
        $s .= ($j == $i) ? '1' : '2';
    $numbers[] = $s;
    $s = '';
}

echo 'Number of pages ', count($numbers);
foreach($numbers as $number){
    echo '<table border="1">';
    foreach(str_split($number) as $num){
        echo '<tr>';
        echo '<td>';
        if($num == 1)
            echo $num;
        echo '</td>';
        echo '<td>';
        if($num == 2)
            echo $num;
        echo '</td>';
        echo '</tr>';
    }
    echo '<hr>';
    echo '</table>';
}