Any hexadecimal conversion class sharing implemented by php, hexadecimal sharing implemented by php_PHP tutorial

PHP implements sharing of arbitrary base conversion classes, PHP implements base sharing

I didn’t know before that php comes with base_convert which can realize conversion between arbitrary bases. Wrote one. . . .

<&#63;php 
/**
 * 进制转换类 
 * @author sgf@funcity
 * @version 2011-02-15
 */
Class Hex{
 
 private static $element = array(
 '0','1','2','3','4','5','6','7','8','9',
 'A','B','C','D','E','F','G','H','I','J',
 'K','L','M','N','O','P','Q','R','S','T',
 'U','V','W','X','Y','Z'
 );
 
 private static $hex_min = 2;
 private static $hex_max = 36;
 
 
 /**
 * 进制转换
 */
 public function conv($int,$out_hex,$in_hex=10,$use_system=true){
 
 if($use_system && function_exists('base_convert')){
  return strtoupper(base_convert($int,$in_hex,$out_hex));
 }
 
 if($out_hex == $in_hex){
  return $int;
 }
 if($out_hex > self::$hex_max || $out_hex < self::$hex_min){
  return false;
 }
 if($in_hex > self::$hex_max || $in_hex < self::$hex_min){
  return false;
 }
 $hex_10 = $this->_conv2hex10($int,$in_hex);
 return strtoupper($this->_conv_hex($hex_10,$out_hex));
 }
 
 /**
 * 将任意进制数字转为10进制数字
 */
 private function _conv2hex10($int,$in_hex){
 $int = strtoupper(trim($int));
 if($in_hex==10){
  return $int;
 }elseif( $in_hex== 2 && function_exists('bindec')){
  return bindec($int);
 } elseif($in_hex== 16 && function_exists('hexdec')){
  return hexdec($int);
 } elseif($in_hex== 8 && function_exists('octdec')){
  return octdec($int);
 }
 $array = array();
 $result = 0;
 for($i=0;$i<strlen($int);$i++){
  array_unshift( $array, substr($int,$i,1)); //插入到数组头部（既倒序）
 }
 foreach($array as $k => $v){
 
  $hex10_value = array_search($v,self::$element);
  if($hex10_value==-1){
  return false;
  }
  $result += intval( pow($in_hex,$k) * $hex10_value );
 
 }
 return $result;
 }
 
 /**
 * 把10进制数换成任意进制数
 */
 private function _conv_hex($hex_10,$out_hex){
 
 $hex_10 = intval($hex_10);
 
 if($out_hex==10){
  return $hex_10;
 }else if( $out_hex==2  && function_exists('decbin')){
  return decbin($hex_10);
 } elseif ( $out_hex ==16 && function_exists('dechex')){
  return dechex($hex_10);
 } elseif ( $out_hex ==8 && function_exists('decoct')){
  return decoct($hex_10);
 }
 
 $array = array();
 $result = ""; 
 
 //利用10进制数除任意进制数 倒取余数法转换。
 do {
  array_unshift( $array, $hex_10 % $out_hex); //余数插入到数组数组第1个位置。
  $hex_10 = $hex_10 / $out_hex ; //除法
 } while ($hex_10>1);
 
 foreach($array as $k){
  $result .= self::$element[$k]; 
 }
 return $result; 
 }
 
 
}
&#63;>

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