String and multi-digit conversion functions in PHP

Conversion function

/**
 * [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("\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;
}

Multi-base in PHP

PHP Integer values ​​can be represented in decimal, hexadecimal, octal or binary, and can be preceded by an optional sign (- or +).

Binary: [+-]?0b[01]+

Octal: [+-]?0[1-7]+

Decimal: [+-]?[1-9][0-9]* |0

Hex: [+-]?[xX][0-9a-fA-F]+

Multiple base conversion function:

bindec	Binary to decimal conversion
decbin	Convert decimal to binary
octdec	Convert octal to decimal
decoct	Convert decimal to octal
hexdec	hexdec Convert system to decimal
dechex	Convert decimal to hexadecimal

The above introduces the string and multi-base conversion functions in PHP, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.