Alphanumeric generator in form

Question

Alphanumeric generator in form

Asked 8 years, 2 months ago

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I have developed an alphanumeric generator routine to be placed in a form field. However, it does not generate the numbering. Someone can help?

That field below:

<div class="guiaprest">
            <label name="tPrest"> 2- Nº Guia no Prestador</label>
        </div>

So I did some research on the Internet, and I found a model and I did this:

<?php
function rand_sem_num_repetido($qtd_numeros,$limite_min,$limite_max){
    for($i=0;$i<=$qtd_numeros;$i++){
        $aux=rand($limite_min,$limite_max);

        if($i>=1){
            while(in_array($aux,$index)){
                $aux=rand($limite_min,$limite_max);
            }
        }

        $index[$i]=$aux;
    }

    return $index;
}
?>

Numeric alpha is letters+nums right? There you are just generating numbers

– Miguel

2016/08/30 at 19:00
Yes. True. I hadn’t noticed it. But even though it’s just numbers in the code above, it doesn’t generate anything.

– Inez Boldrin

2016/08/30 at 19:02
You have to call the function. I ran well the code you put, maybe it just lacks the implode(), I will answer below

– Miguel

2016/08/30 at 19:06
Okay Miguel, I’ll be waiting.

– Inez Boldrin

2016/08/30 at 19:21
A question: rand_sem_num_repetido This is because there’s supposed to be the same number repeated?

– Miguel

2016/08/30 at 19:28
Yes. When generating a new sequence, it cannot be the same as the previous one.

– Inez Boldrin

2016/08/30 at 19:29

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by Augusto • **620** points · Answer 1 · 2016-08-30T19:25:42+00:00

function rand_sem_num_repetido($qtd_numeros,$limite_min,$limite_max){
    $index = array();
    for($i=0;$i<$qtd_numeros;$i++){
       $aux=rand($limite_min,$limite_max);

       if($i>=1){
           while(in_array($aux,$index)){
               $aux=rand($limite_min,$limite_max);
           }
       }

       $index[$i]=$aux;
    }
    return implode($index);
}

Try it this way. But this function does not generate an alphanumeric, and this parameter $qtd_numeros will not limit the number of characters can come 2 characters but 1 number. (Ex.: 10 (Ten)). To limit the number of characters you can change the return to return substr(implode($index), 0, $qtd_numeros); or pass $limite_min = 0 and $limite_max = 9.