Error with fuction

Code:

PHP:

    public function gerarKey($tamanho = 10, $maiusculas = true, $numeros = true){
        $lmin = 'abcdefghijklmnopqrstuvwxyz';
        $lmai = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $num = '1234567890';
       
        $caract = "";
        $retorno = "";
       
        $caract .= $lmin;
        if($maiusculas) $caract .= $lmai;
        if($numeros) $caract .= $num;
       
        $len = strlen($caract);
        for($n = 1; $n <= $tamanho; $n++){
            $rand = mt_rand(1, $len);
            $retorno .= $caract[$rand-1];
        }
        return $retorno;
    }
 

Error:

Code:

[22:12:22] [Server thread/INFO]: An unknown error occurred while attempting to perform this command
[22:12:22] [Server thread/CRITICAL]: Unhandled exception executing command 'key' in key: Call to undefined function Keys\gerarKey()
[22:12:22] [Server thread/CRITICAL]: Error: "Call to undefined function Keys\gerarKey()" (EXCEPTION) in "/zip_Keys_v2_rFNwRYPlOBRLsSH/src/Keys/Main" at line 46
 

Line 46:

PHP:

                 $gerar = gerarKey(10); 

 

PHP:

$gerar = $this->gerarKey(10);


 

this needs to be in the facepalm section

 

It is not encryption, I just need MAIUSCULAS and MINUSCULAS and numbers.

 

thx