Print an associative array as an ASCII table and also apply different colors to each column in the table

ascii-table

<?php

$initial_array = array(
	array(
		'Name' => 'Trixie',
		'Color' => 'Green',
		'Element' => 'Earth',
		'Likes' => 'Flowers'
	),
	array(
		'Name' => 'Tinkerbell',
		'Element' => 'Air',
		'Likes' => 'Singing',
		'Color' => 'Blue'
	),
	array(
		'Element' => 'Water',
		'Likes' => 'Dancing',
		'Name' => 'Blum',
		'Color' => 'Pink'
	),
);

$column_colors = array('#00FFFF', 'pink','#00FF88','#99BBFF');

const horizontal_space = 1;
const vertical_space = 0;
const plus_char = '+';
const dash_char = '-';
const pipe_char = '|';

function render_ascii_table($initial_array, $column_colors){

  if(!empty($initial_array) && (count($initial_array[0]) != count($column_colors) ))
		die('color codes doesn\'t match with key numbers');

	$nl = "\n";
	$headers = get_table_headers($initial_array);
	$data_lengths = data_lengths($initial_array, $headers);
	$row_separator = separate_row($data_lengths, $column_colors);
	$row_space = add_row_space($data_lengths, $column_colors);
	$row_headers = display_header($headers, $data_lengths, $column_colors);

	echo '<pre>';

		echo $row_separator . $nl;
		echo str_repeat($row_space . $nl, vertical_space);
		echo $row_headers . $nl;
		echo str_repeat($row_space . $nl, vertical_space);
		echo $row_separator . $nl;
		echo str_repeat($row_space . $nl, vertical_space);
		foreach($initial_array as $row_data)
		{
			$row_data = display_data($row_data, $headers, $data_lengths, $column_colors);
			echo $row_data . $nl;
			echo str_repeat($row_space . $nl, vertical_space);
		}
		echo $row_separator . $nl;

	echo '</pre>';

}

function get_table_headers($initial_array){
	return array_keys(reset($initial_array));
}

function data_lengths($initial_array, $headers){
	$lengths = array();
	foreach($headers as $header)
	{
		$header_length = strlen($header);
		$max = $header_length;
		foreach($initial_array as $row)
		{
			$length = strlen($row[$header]);
			if($length > $max)
				$max = $length;
		}

		if(($max % 2) != ($header_length % 2))
			$max += 1;

		$lengths[$header] = $max;
	}

	return $lengths;
}

function separate_row($data_lengths, $column_colors){
	$row = '';
	$color_index = 0;
	foreach($data_lengths as $column_length)
	{
		$row .= plus_char .'<span style="background-color:'.$column_colors[$color_index].'">'. str_repeat(dash_char, (horizontal_space * 2) + $column_length).'</span>';
		$color_index++;
	}
	$row .= plus_char;

	return $row;
}

function add_row_space($data_lengths, $column_colors){
	$row = '';
	$color_index = 0;
	foreach($data_lengths as $column_length)
	{
		$row .= pipe_char .'<span style="background-color:'.$column_colors[$color_index].'">'. str_repeat(' ', (horizontal_space * 2) + $column_length).'</span>';
		$color_index++;
	}
	$row .= pipe_char;

	return $row;
}

function display_header($headers, $data_lengths, $column_colors){
	$row = '';
	$color_index = 0;
	foreach($headers as $header)
	{
		$row .= pipe_char . '<span style="background-color:'.$column_colors[$color_index].'" >' . str_pad($header, (horizontal_space * 2) + $data_lengths[$header], ' ', STR_PAD_BOTH).'</span>';
		$color_index++;
	}
	$row .= pipe_char;

	return $row;
}

function display_data($row_data, $headers, $data_lengths, $column_colors){
	$row = '';
	$color_index = 0;
	foreach($headers as $header)
	{
		$row .= pipe_char . '<span style="background-color:'.$column_colors[$color_index].'" >' . str_repeat(' ', horizontal_space) . str_pad($row_data[$header], horizontal_space + $data_lengths[$header], ' ', STR_PAD_RIGHT).'</span>';
		$color_index++;
	}
	$row .= pipe_char;

	return $row;
}

render_ascii_table($initial_array, $column_colors);