[李景山php]每天laravel-20160917|BcryptHasher

<?php

namespace Illuminate\Hashing;

use RuntimeException;
use Illuminate\Contracts\Hashing\Hasher as HasherContract;
// more namespace
class BcryptHasher implements HasherContract
{// this BcryptHasher implements HasherContract
/**
* Default crypt cost factor.
*
* @var int
*/
protected $rounds = 10;// Default crypt cost factor

/**
* Hash the given value.
*
* @param  string  $value
* @param  array   $options
* @return string
*
* @throws \RuntimeException
*/
public function make($value, array $options = [])// one is value ,other is config or options
{// Hash the given value. means to crypt this value
$cost = isset($options['rounds']) ? $options['rounds'] : $this->rounds;// get the rounds use like cost

$hash = password_hash($value, PASSWORD_BCRYPT, ['cost' => $cost]);// use a wrap function to finish this action
// with three parameter ,value flag and config about cost

if ($hash === false) {// if wrong throw Exception
throw new RuntimeException('Bcrypt hashing not supported.');
}
// else return this value
return $hash;
}

/**
* Check the given plain value against a hash.
*
* @param  string  $value
* @param  string  $hashedValue
* @param  array   $options
* @return bool
*/
public function check($value, $hashedValue, array $options = [])
{
if (strlen($hashedValue) === 0) {
return false;
}// check len about this str

return password_verify($value, $hashedValue);// use a wrap function
// two parameter ,one is value and other is hashedValue
}//check the given value

/**
* Check if the given hash has been hashed using the given options.
*
* @param  string  $hashedValue
* @param  array   $options
* @return bool
*/
public function needsRehash($hashedValue, array $options = [])// determine thi value is been hashed
{
$cost = isset($options['rounds']) ? $options['rounds'] : $this->rounds;

return password_needs_rehash($hashedValue, PASSWORD_BCRYPT, ['cost' => $cost]);
}// a wrap function

/**
* Set the default password work factor.
*
* @param  int  $rounds
* @return $this
*/
public function setRounds($rounds)
{
$this->rounds = (int) $rounds;

return $this;
}// set Rounds
}