转换函数
/**
* [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 $intType
* @return string byte_str [处理结果]
* @author alexander
*/
function strtoascii($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("\r\n", $byte_array));
foreach($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;
}
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