Generating confirmation code for an email confirmation

Question

Using PHP, what are some ways to generate a random confirmation code that can be stored in a DB and be used for email confirmation? I can\'t for the life of me think of a wa

Answer 1

  private  function generateCodeSecurity()
  {
    list($usec, $sec) = explode(" ", microtime());
    $micro = usec + $sec;

    $hoy = date("Y-m-d");  
    $str = str_replace('-','',$hoy); 

    return  rand($str,  $micro);

  }

With this little code, you can generate a random number, with a range of 7 to 11 numbers.

Using php functions:

Rand ();
Microtime ()



$hoy = date("Y-m-d");  
$str = str_replace('-','',$hoy); 

echo $str; 
result date: 20170217



 list($usec, $sec) = explode(" ", microtime());
 $micro = usec + $sec;


echo $micro;
result  micro varaible: 1487340849

Passing parameters in this function:rand ();

 rand($str,  $micro);

and return;

example:

 list($usec, $sec) = explode(" ", microtime());
    $micro = usec + $sec;

    $hoy = date("Y-m-d");  
    $str = str_replace('-','',$hoy); 

   $finalresult = rand($str,  $micro);

echo $finalresult; 

result: 1297793555

I think it is difficult to repeat this number, for the reason it will never be the same day, nor the same hour, nor the same milliseconds of time.