php怎么实现数值转十进制

本文操作环境：windows7系统、php7.1版、DELL G3电脑

临高网站制作公司哪家好，找创新互联！从网页设计、网站建设、微信开发、APP开发、成都响应式网站建设等网站项目制作，到程序开发，运营维护。创新互联于2013年创立到现在10年的时间，我们拥有了丰富的建站经验和运维经验，来保证我们的工作的顺利进行。专注于网站建设就选创新互联。

php怎么实现数值转十进制？

php实现将任意进制数转换成10进制的方法

本文实例讲述了php实现将任意进制数转换成10进制的方法。分享给大家供大家参考。具体如下：

php将任意进制的数转换成10进制，例如8进制转换成10进制，16进制转换成10进制

Convert the base $base number $number to a
  base 10 number:
";
  print "Convert the integer component ($integer) of the
   number:
";
 // Compute the value of the integer component
 // Loop through the integer digit by digit
 // Reverse the number for easier handling
 $integer = strrev ($integer);
 $length = strlen ($integer);
 for ($pos = 0; $pos < $length; ++$pos)
 {
  /*
   PHP lets you treat strings and numbers like arrays
   Specify an offset and get the character at that
   position
  */
   $digit = $integer[$pos];
  // Handle character values for digits
  // (for bases greater than 10)
  if (eregi ('[a-z]', $digit))
  {
   $digit_value =
     (ord (strtolower ($digit))
     - ord ('a')) + 10;
    $digit = "$digit ($digit_value)";
  }
  else
  {
   $digit_value = $digit;
  }
  // Multiply the current digit by the radix
  // raised to the power of the current position
  $result = $digit_value * pow ($base, $pos);
   print "Multiply the value of the digit at position
    $pos by the value of the radix ($base) raised
    to the power of the position ($pos):
";
   print "$digit * $base$pos = $result
    

";
   $sums[] = $result;
 }
 print '
';
 if (isset ($decimal))
 {
   print "Convert the decimal component (0.$decimal)
   of the number:
";
  // Pad the number with a leading 0 so that we can
  // start at position 1
  $decimal = '0'.$decimal;
  $length = strlen ($decimal);
   for ($pos = 1; $pos < $length; ++$pos) {
   $digit = $decimal[$pos];
   // Handle character values for digits
   // (for bases greater than 10)
   if (eregi ('[a-z]', $digit))
   {
     $digit_value =
     (ord (strtolower ($digit))
     - ord ('a')) + 10;
      $digit = "$digit ($digit_value)";
   }
   else
   {
     $digit_value = $digit;
   }
   // Multiply the current digit by the radix
   // raised to the power of the current position
   $result = $digit_value * pow (1/$base, $pos);
    print "Multiply the value of the digit at
    position $pos by the value of the 1/radix
    ($base) raised to the power of the position
    ($pos):
";
    print "$digit * 1/$base$pos =
    $result

";
    $sums[] = $result;
  }
  print '
';
 }
 $sums = implode (' + ', $sums);
 eval ("\$base_10_value = $sums;");
  print "
The value of the base $base number
  $number in base 10 is $base_10_value. 
";
  print "This number is derived from the sum of the values
  of the previous operations ($sums). 
 
";
}

分享名称：php怎么实现数值转十进制
文章源于：http://www.shufengxianlan.com/qtweb/news48/288448.html

网站建设、网络推广公司-创新互联，是专注品牌与效果的网站制作，网络营销seo公司；服务项目有等

广告

声明：本网站发布的内容（图片、视频和文字）以用户投稿、用户转载内容为主，如果涉及侵权请尽快告知，我们将会在第一时间删除。文章观点不代表本网站立场，如需处理请联系客服。电话：028-86922220；邮箱：631063699@qq.com。内容未经允许不得转载，或转载时需注明来源： 创新互联