Replace substring, append some string demo for preg_replace_callback

Replacer.php

<?php


class Replacer {
	private static $__instance;
	private $regex   = '';
	private $append  = '';
	private $replace = array(
		'ул'  => 'улица',
		'ш'   => 'шоссе',
		'пр'  => 'проспект',
		'пер' => 'переулок',
		'бул' => 'бульвар',
	);
	
	public function __construct (Array $replace = array()) {
		if (!empty($replace)) {
			$this->replace = $replace;
		}
		$this->regex .= '/\s*(';
		$this->regex .= implode(
			'|',
			array_map(
				'preg_quote',
				array_keys($this->replace)
			)
		);
		$this->regex .= ')\.\s*/ui';
	}
	private function __replace_callback ($matches) {
		if (isset($this->replace[ $matches[1] ])) {
			$this->append = ' ' . $this->replace[ $matches[1] ];
		}
		return '';
	}
	private function append ($output) {
		$output .= $this->append;
		$this->append = '';
		return $output;
	}
	public function replace ($input) {
		return $this->append( preg_replace_callback(
			$this->regex,
			array($this, "__replace_callback"),
			$input
		) );
	}
	public static function str ($input) {
		if (empty(self::$__instance)) {
			self::$__instance = new Replacer;
		}
		return self::$__instance->replace($input);
	}
}

foreach (array("ул. Ленина","Торфяная улица","Моссковское ш.") as $input) {
	echo $input, " => ", Replacer::str($input), PHP_EOL;
}