anyone knows how to print this pattern in php - php

Question

Expected output :
my current code only output the pattern but it can't have more comb:
$n = 5;
$n1 = 4;
for ($i = 0; $i <= $n; $i++) {
for ($j = 0; $j <= $n1; $j++) {
if (($i == 0 || $i == 5) && ($j > 0 and $j < 3)) {
if (($i == 0 && $j == 1) || ($i == $n && $j != 2)) {
printf(" ");
}
printf("$i");
} elseif (($j == 0 || $j == 3) && ($i != 0 and $i != 5)) {
if ($j == 0 && $i != 1 && $i != 4) {
printf("");
} elseif (($j == 3 && $i != 1 && $i != 4)) {
printf("  ");
} elseif ($j == 0) {
printf(" ");
}
printf("$i");
} else {
printf(" ");
}
}
echo "<be>";
`
this is the output the only problem is how do i multiply the comb.

Answer 1

Just for fun I wrote it in JS, but probably pretty straightforward to convert to PHP (String.repeat => str_repeat, [].push => array_push, [].slice => array_slice, etc)
const arr = [];
const output = (x=1, y=1) => {
for (let k = 0; k < 5; k++) {
arr.push([' '.repeat(5-k), k, ' '.repeat(k), k, ' '.repeat(5-k)].join(''))
}
for (let k = 5; k <= 10; k++) {
arr.push([' '.repeat(k-5), 10-k, ' '.repeat(10-k), 10-k, ' '.repeat(k-5)].join(''))
}
arr.forEach((row, index) => {
arr[index] = row + row.substring(1).repeat(x - 1);
});
const orig = [...arr.slice(1)]
for (let i = 1; i < y; i++) {
arr.push(...orig);
}
console.log(arr.join('\n'))
}
output(2,3)

Answer 2

The simplest way is to create an array, where 1 = '*' and 0 = ' '.
This is the algorithm in PHP 7 that I have done to create the pattern.
Note: I have made changes to optimize the code
<?php
$max = 6;
// Arg
$arg1 = 2;
$arg2 = 2;
// Change to pair size when is non
if ($max % 2 != 0) {
++$max;
}
// Matrix with zero values
$t = \array_fill(0, $max * $arg1 - $arg1 + 1, \array_fill(0, $max * $arg2 - $arg2 + 1, 0));
// Lower: start left position
$lower = $max / 2 - 1;
// Upper: start right postion
$upper = $lower + 1;
// Set pattern in matrix
for ($i = 0, $n = $max - 1; $i <= $n; $i++, $lower--, $upper++) {
for ($a1 = 0; $a1 < $arg1; $a1++) {
for ($a2 = 0; $a2 < $arg2; $a2++) {
$y = $i + $max * $a1 - $a1;
$p = $max * $a2 - $a2;
// Set pixel pattern
$t[$y][$lower + $p] = $t[$y][$upper + $p] = 1;
}
}
// Restart lower?
if ($lower == 0) {
$lower = $max;
}
// Restart upper?
if ($upper == $n) {
$upper = -1;
}
}
echo '<pre>', \PHP_EOL;
foreach ($t as $r) {
foreach ($r as $v) {
if ($v) {
echo '*';
} else {
echo ' ';
}
}
echo \PHP_EOL;
}
echo '</pre>';
?>
Output:
** **
* * * *
* * *
* * *
* * * *
** **
* * * *
* * *
* * *
* * * *
** **