Markdown table format

MarkdownTableFormat.php

<?php

$a = <<<EOT
Markdown table content
EOT;

$a = explode("\n", $a);
$c = "";
$ll = [];
foreach ($a as  &$aa) {
    $aa = trim($aa, "|\r\n");
    $aa = explode("|", $aa);

    $aa = array_map("trim", $aa);
    $aa = array_values($aa);
    
    foreach ($aa as $k => $dd) {
        if (isset($ll[$k])) {
            $ll[$k] = strlen($dd) > $ll[$k] ? strlen($dd) : $ll[$k];
        } else {
            $ll[$k] = strlen($dd);
        }
    }
}

foreach ($a as $line => $bb) {
    if ($line == 1) {
        foreach ($bb as $k => &$dd) {
            if (str_replace('-', '', $dd)) {
                $dd = str_pad($dd, $ll[$k]);
            } else { //header
                $dd = str_repeat("-", $ll[$k]);
            }
        }
    } else {
        foreach ($bb as $k => &$dd) {
            $dd = str_pad($dd, $ll[$k]);
        }
    }
    $c .= "| " . implode(" | ", $bb) . " |" .  "\n";
}
echo $c;