Symfony2 Console Table Helper

TableHelper.php

<?php

namespace Xanido\Console\Helper;

use Symfony\Component\Console\Helper\Helper as AbstractHelper;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * Text Table Helper
 * @author Timothy Anido <xanido@gmail.com>
 *
 * Based on draw_text_table by Paul Maunders
 * Available at http://www.pyrosoft.co.uk/blog/2007/07/01/php-array-to-text-table-function/
 */
class TableHelper extends AbstractHelper
{
	/**
	 * Takes a 2 dimensional tabular array (or iterable object) and outputs an ascii table
	 * 
	 * @param  OutputInterface $output
	 * @param  array           $table
	 * @param  int             $crop    Maximum column width
	 * @param  boolean         $rowKeys Display the keys as first column
	 */
	public function write( OutputInterface $output, $table, $crop = null, $rowKeys = false ) {

	    // Work out max lengths of each cell
	    $longest_key = 0;
	    foreach ($table AS $row_key => $row) {
	        $cell_count = 0;
	        foreach ($row AS $key=>$cell) {
	            $cell_length = strlen($cell);

	            $cell_count++;
	            if (!isset($cell_lengths[$key]) || $cell_length > $cell_lengths[$key]) $cell_lengths[$key] = $crop === null ? $cell_length : min( $cell_length, $crop );
	        }
	        $key_length = strlen($row_key);
	        $longest_key = $key_length < $longest_key ?: $key_length;
	    }

	    // Build header bar
	    $bar = '+';
	    $header = '|';
	    $i=0;

	    if( $rowKeys ) {
	    	$bar .= str_pad('', $longest_key+2, '-')."+";
	    	$header .= ' <info>'.str_pad('', $longest_key, ' ', STR_PAD_RIGHT) . "</info> |";
	    }

	    foreach ($cell_lengths AS $fieldname => $length) {
	        $i++;
	        $bar .= str_pad('', $length+2, '-')."+";

	        $name = $fieldname;
	        if (strlen($name) > $length) {
	            // crop long headings
	            $name = substr($name, 0, max(0, $length-1));
	        }
	        $header .= ' <info>'.str_pad($name, $length, ' ', STR_PAD_RIGHT) . "</info> |";

	    }


	    $output->writeln( $bar );
	    $output->writeln( $header );
	    $output->writeln( $bar );

	    // Draw rows
	    foreach ($table AS $key => $row) {
	    	$out = '';
	        $out .= "|";
	        if( $rowKeys) {
	        	$out .= ' '.str_pad(substr($key,0,$longest_key), $longest_key, ' ', STR_PAD_RIGHT) . " |";
	        }
	        foreach ($row AS $key=>$cell) {
	            $out .= ' '.str_pad(substr($cell,0,$cell_lengths[$key]), $cell_lengths[$key], ' ', STR_PAD_RIGHT) . " |";
	        }
	        $output->writeln( $out );
	    }

	    $output->writeln( $bar );
	}

	/**
	 * @inheritdoc
	 */
	public function getName()
	{
		return 'table';
	}
}