PHPでCLIのプログレスバーを作るぞーうおー

demo.php

<?php
$max = 100;
$progress = new \Cli\ProgressBar(STDOUT, $max);

for($i = 1; $i <= $max; $i++) {
	$progress->current($i);
	sleep(1);
}
$progress->done();

progressbar.php

<?php

namespace Cli;

class ProgressBar
{
	public $precision = 4;
	public $fillChar = '#';
	public $blankChar = ' ';

	protected $max;
	protected $width = 0;
	protected $stream = null;

	public function __construct($stream = STDOUT, $max = 0)
	{
		$this->stream = $stream;
		$this->max = $max;

		list($h, $this->width) = $this->getScreenSize();
	}

	public function current($current)
	{
		$line = $this->generateLine($current);
		$this->write($line."\r");
	}

	public function done()
	{
		$this->write(PHP_EOL);
	}

	protected function getScreenSize()
	{
		$line = exec('stty -a | grep columns');
		preg_match_all('/rows (\d+).*?columns (\d+)/', $line, $matches);

		$sizes = [];
		foreach(array_slice($matches, 1) as $match) $sizes[] = (int)$match[0];

		return $sizes;
	}

	protected function generateLine($current)
	{
		$ratio    = $current / $this->max;
		$percent  = round($ratio * 100, $this->precision);
		$template = $this->template();

		// shellの幅から必要な文字列の幅を引いて動的に幅を決定
		$tokens = array_map('strlen', [$current, $this->max, $percent, $template]);
		$rest   = $this->width - array_sum($tokens);
		$bar    = $this->generateBar($percent, $rest);

		$line = sprintf($template, $bar, $current, $this->max, $percent);

		return $line;
	}

	protected function template()
	{
		return '[%s] %d/%d (%.'.$this->precision.'f%%)';
	}

	protected function generateBar($percent, $width)
	{
		$fill     = (int)(($width) * ($percent / 100));

		$filled   = str_repeat($this->fillChar, $fill);
		$blancked = str_repeat($this->blankChar, $width - $fill);

		$bar = "{$filled}{$blancked}";
		return $bar;
	}

	protected function write($line)
	{
		fwrite($this->stream, $line);
	}
}