php CliOutput from https://www.if-not-true-then-false.com/2010/php-class-for-coloring-php-command-line-cli-scripts-output-php-output-colorizing-using-bash-shell-colors/

CliOutput.php

<?php

namespace Vendor\CliOutput;

class CliOutput
{
    const BLACK = 'black';
    const DARK_GRAY = 'dark_gray';
    const BLUE = 'blue';
    const LIGHT_BLUE = 'light_blue';
    const GREEN = 'green';
    const LIGHT_GREEN = 'light_green';
    const CYAN = 'cyan';
    const LIGHT_CYAN = 'light_cyan';
    const RED = 'red';
    const LIGHT_RED = 'light_red';
    const PURPLE = 'purple';
    const LIGHT_PURPLE = 'light_purple';
    const BROWN = 'brown';
    const YELLOW = 'yellow';
    const LIGHT_GRAY = 'light_gray';
    const WHITE = 'white';

    private $foreground_colors = array();
    private $background_colors = array();

    public function __construct() {
        // Set up shell colors
        $this->foreground_colors['black'] = '0;30';
        $this->foreground_colors['dark_gray'] = '1;30';
        $this->foreground_colors['blue'] = '0;34';
        $this->foreground_colors['light_blue'] = '1;34';
        $this->foreground_colors['green'] = '0;32';
        $this->foreground_colors['light_green'] = '1;32';
        $this->foreground_colors['cyan'] = '0;36';
        $this->foreground_colors['light_cyan'] = '1;36';
        $this->foreground_colors['red'] = '0;31';
        $this->foreground_colors['light_red'] = '1;31';
        $this->foreground_colors['purple'] = '0;35';
        $this->foreground_colors['light_purple'] = '1;35';
        $this->foreground_colors['brown'] = '0;33';
        $this->foreground_colors['yellow'] = '1;33';
        $this->foreground_colors['light_gray'] = '0;37';
        $this->foreground_colors['white'] = '1;37';

        $this->background_colors['black'] = '40';
        $this->background_colors['red'] = '41';
        $this->background_colors['green'] = '42';
        $this->background_colors['yellow'] = '43';
        $this->background_colors['blue'] = '44';
        $this->background_colors['magenta'] = '45';
        $this->background_colors['cyan'] = '46';
        $this->background_colors['light_gray'] = '47';
    }

    // Returns colored string
    public function getColoredString($string, $foreground_color = null, $background_color = null)
    {
        $colored_string = "";

        // Check if given foreground color found
        if (isset($this->foreground_colors[$foreground_color])) {
            $colored_string .= "\033[" . $this->foreground_colors[$foreground_color] . "m";
        }
        // Check if given background color found
        if (isset($this->background_colors[$background_color])) {
            $colored_string .= "\033[" . $this->background_colors[$background_color] . "m";
        }

        // Add string and end coloring
        $colored_string .=  $string . "\033[0m";

        return $colored_string;
    }

    // Returns all foreground color names
    public function getForegroundColors()
    {
        return array_keys($this->foreground_colors);
    }

    // Returns all background color names
    public function getBackgroundColors()
    {
        return array_keys($this->background_colors);
    }
}