关于PHP中字符串与多进制转换函数的实例代码

/** * [字符串转换为(2,8,16进制)ascii码] * @param string $str [待处理字符串] * @param boolean $encode [字符串转换为ascii|ascii转换为字符串] * @param string $inttype [2,8,16进制标示] * @return string byte_str [处理结果] * @author alexander */ function strtoascii($str, $encode=true, $inttype="2"){ if($encode == true){ $byte_array = str_split($str); foreach($byte_array as &$value){ $value = ord($value); switch ($inttype) { case 16: $value = sprintf("%02x", $value); break; case 8: $value = sprintf("%03o", $value); break; default: $value = sprintf("%08b", $value); break; } } unset($value); $byte_str = implode('', $byte_array); } else{ $chunk_size = $inttype == 16 ? 2 : ($inttype == 8 ? 3 : 8); $byte_array = chunk_split($str, $chunk_size); $byte_array = array_filter(explode("rn", $byte_array)); foreach($byte_array as &$value){ $fun_name = $inttype == 16 ? 'hexdec' : ($inttype == 8 ? 'octdec' : 'bindec'); $value = $fun_name($value); $value = chr($value); } unset($value); $byte_str = implode('', $byte_array); } return $byte_str; }