utils.php

<?php
class Utils{
 
 function getToken($length=32){
    $token = "";
    $codeAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    $codeAlphabet.= "abcdefghijklmnopqrstuvwxyz";
    $codeAlphabet.= "0123456789";
    for($i=0;$i<$length;$i++){
        $token .= $codeAlphabet[$this->crypto_rand_secure(0,strlen($codeAlphabet))];
    }
    return $token;
}
 
function crypto_rand_secure($min, $max) {
    $range = $max - $min;
    if ($range < 0) return $min; // not so random...
    $log = log($range, 2);
    $bytes = (int) ($log / 8) + 1; // length in bytes
    $bits = (int) $log + 1; // length in bits
    $filter = (int) (1 << $bits) - 1; // set all lower bits to 1
    do {
        $rnd = hexdec(bin2hex(openssl_random_pseudo_bytes($bytes)));
        $rnd = $rnd & $filter; // discard irrelevant bits
    } while ($rnd >= $range);
    return $min + $rnd;
}

// send email using built in php mailer
public function send_mail($from_name, $from_email, $send_to_email, $subject, $body){

    $headers  = "MIME-Version: 1.0\r\n";
    $headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
    $headers .= "From: {$from_name} <{$from_email}> \n";
 
    if(mail($send_to_email, $subject, $body, $headers)){
        return true;
    }
 
    return false;
}

}
?>