Answers for "php base64_encode avoid using + sign"

base64 encode username password php example

$auth = base64_encode($uname . ":" . $pass);
curl_setopt($curl, CURLOPT_HTTPHEADER, array("Authorization: Basic $auth",
                                              "Accept: application/json",
                                              "Content-Type: application/json"));

php detect base64 encoding

function is_base64_encoded($data)
{
    if (preg_match('%^[a-zA-Z0-9/+]*={0,2}$%', $data)) {
       return TRUE;
    } else {
       return FALSE;
    }
};

is_base64_encoded("iash21iawhdj98UH3"); // true
is_base64_encoded("#iu3498r"); // false
is_base64_encoded("asiudfh9w=8uihf"); // false
is_base64_encoded("a398UIhnj43f/1!+sadfh3w84hduihhjw=="); // false