Sep 24, 2018 The rand function is used in PHP to generate a random integer. The rand PHP function can also be used to generate a random number within a. Nov 11, 2017 The key generated by typing a command which is executed as follows: php artisan key:generate. So, the command itself will sets the APPKEY value in your.env file.
When enough entropy is collected the key is generated and added to the keyring: We need to generate a lot of random bytes. It is a good idea to perform some other action (type on the keyboard, move the mouse, utilize the disks) during the prime generation; this gives the random number generator a better chance to gain enough entropy. Note: On some platforms (such as Windows), getrandmax is only 32767. If you require a range larger than 32767, specifying min and max will allow you to create a range larger than this, or consider using mtrand instead. Note: As of PHP 7.1.0, rand uses the same random number generator as mtrand. Avast internet security license key generator. This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using randomint, randombytes, or opensslrandompseudobytes instead. Random Password Generator. This form allows you to generate random passwords. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.
Php Random Number
I used below function to create random token, and also a salt from the token. I used it in my application to prevent CSRF attack.
<?php
function RandomToken($length = 32){
if(!isset($length) intval($length) <= 8 ){
$length = 32;
}
if (function_exists('random_bytes')) {
return bin2hex(random_bytes($length));
}
if (function_exists('mcrypt_create_iv')) {
return bin2hex(mcrypt_create_iv($length, MCRYPT_DEV_URANDOM));
}
if (function_exists('openssl_random_pseudo_bytes')) {
return bin2hex(openssl_random_pseudo_bytes($length));
}
}
function Salt(){
return substr(strtr(base64_encode(hex2bin(RandomToken(32))), '+', '.'), 0, 44);
}
echo (RandomToken());
echo 'n';
echo Salt();
echo 'n';
/*
This function is same as above but its only used for debugging
*/
function RandomTokenDebug($length = 32){
if(!isset($length) intval($length) <= 8 ){
$length = 32;
}
$randoms = array();
if (function_exists('random_bytes')) {
$randoms['random_bytes'] = bin2hex(random_bytes($length));
}
if (function_exists('mcrypt_create_iv')) {
$randoms['mcrypt_create_iv'] = bin2hex(mcrypt_create_iv($length, MCRYPT_DEV_URANDOM));
}
if (function_exists('openssl_random_pseudo_bytes')) {
$randoms['openssl_random_pseudo_bytes'] = bin2hex(openssl_random_pseudo_bytes($length));
}
return $randoms;
}
echo 'n';
print_r (RandomTokenDebug());
?>