PHP aligned plain-text CLI table renderer

<?php
function render_table(array $headers, array $rows): string
{
    $widths = array_map('strlen', $headers);
    foreach ($rows as $row) {
        foreach (array_values($row) as $i => $cell) {
            $widths[$i] = max($widths[$i] ?? 0, strlen((string) $cell));
        }
    }
    $line = function (array $cells) use ($widths): string {
        $parts = [];
        foreach (array_values($cells) as $i => $cell) {
            $parts[] = str_pad((string) $cell, $widths[$i]);
        }
        return implode(' | ', $parts);
    };
    $divider = implode('-+-', array_map(fn ($w) => str_repeat('-', $w), $widths));
    $out = [$line($headers), $divider];
    foreach ($rows as $row) $out[] = $line($row);
    return implode(PHP_EOL, $out);
}