自定义php加密和解密方法

1.手动完成自定义加密解密方法

$content = "thisiscontent";
$key = "miyao";
//加密方法
function encode($string = '', $skey = 'wenzi') {
    $strArr = str_split(base64_encode($string));
    $strCount = count($strArr);
    foreach (str_split($skey) as $key => $value){
     $key < $strCount && $strArr[$key].=$value;
    }
    return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
}
//解密方法
function decode($string = '', $skey = 'wenzi') {
    $strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
    $strCount = count($strArr);
    foreach (str_split($skey) as $key => $value){
     $key <= $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
    }
    return base64_decode(join('', $strArr));
}

$strings = encode($content,$key);
echo decode($strings,$key);