<?php
/**
 * String Flipper Class
 * This class is a rewrite from here:
 * http://masnun.com/flipper/
 * I cleaned and simplyfied the code
 * Julius Beckmann
 * http://juliusbeckmann.de/blog/
 */

/**
 * String Flipper Class
 * This class can "flip" a text around 180°
 * by the use of unicode chars.
 */
class StringFlipper {

	/**
	 * Flips a string
	 * @param string $str String to flip
	 * @return string flipped string
	 */
	function flipString($str) {
		$ret = '';
		$str = strtolower($str);
		for ($i = strlen($str)-1; $i >= 0; --$i) 
			$ret .= $this->flipChar($str[$i]);
		return $ret;
	}

	/**
	 * Flips a single char
	 * @param string $char Char to flip
	 * @return string flipped Char
	 */
	function flipChar($char) {
		$ret = $char;
		$charu = $this->getUnicode($char);
		if($charu !== false) {
			if(strlen($charu) > 2)
				$charu = '&#'.hexdec(substr($charu, 2)).';'; 
			$ret = $charu;
		}			
		return $ret;
	}

	/**
	 * Returns Unicode alternative
	 * @param string $c char to convert
	 * @return string alternate unicode char or false
	 */
	function getUnicode($c) {		
		$ret = false;
		switch($c) {
			
			// Alphabet
			case 'a': $ret = '\u0250'; break;
			case 'b': $ret = 'q';      break;
			case 'c': $ret = '\u0254'; break;
			case 'd': $ret = 'p';      break;
			case 'e': $ret = '\u01DD'; break;
			case 'f': $ret = '\u025F'; break;
			case 'g': $ret = 'b';      break;
			case 'h': $ret = '\u0265'; break;
			case 'i': $ret = '\u0131'; break; //'\u0131\u0323' 
			case 'j': $ret = '\u0638'; break;
			case 'k': $ret = '\u029E'; break;
			case 'l': $ret = '1';      break;
			case 'm': $ret = '\u026F'; break;
			case 'n': $ret = 'u';      break;
			case 'o': $ret = 'o';      break;
			case 'p': $ret = 'd';      break;
			case 'q': $ret = 'b'; break;
			case 'r': $ret = '\u0279'; break;
			case 's': $ret = 's';      break;
			case 't': $ret = '\u0287'; break;
			case 'u': $ret = 'n';      break;
			case 'v': $ret = '\u028C'; break;
			case 'w': $ret = '\u028D'; break;
			case 'x': $ret = 'x';      break;
			case 'y': $ret = '\u028E'; break;
			case 'z': $ret = 'z';      break;
			
			// Brackets
			case '[': $ret = ']';      break;
			case ']': $ret = '[';      break;
			case '(': $ret = ')';      break;
			case ')': $ret = '(';      break;
			case '{': $ret = '}';      break;
			case '}': $ret = '{';      break;
			
			// Dotting
			case '?': $ret = '\u00BF'; break;
			case '\u00BF': $ret = '?'; break;
			case '!': $ret = '\u00A1'; break;
			case '\u00A1': $ret = '!'; break;		
			case '\'': $ret = ',';     break;
			case ',': $ret = '\'';     break;
			
		}
		return $ret;
	}
}


?>