Function mcrypt_get_iv_size() is deprecated

Abigail Banquil

Hello,
I'm quite new to Laravel and my first project was to clone from a git repository. Then I executed composer install after that and got this error when i tried accessing the project with the browser.

ErrorException (E_DEPRECATED)

Function mcrypt_get_iv_size() is deprecated
Open: C:\laragon\www\projectAvocado\vendor\laravel\framework\src\Illuminate\Encryption\Encrypter.php

/**
 * Update the block size for the current cipher and mode.
 *
 * @return void
 */
protected function updateBlockSize()
{
	$this->block = mcrypt_get_iv_size($this->cipher, $this->mode);
}

I browsed StackEx which is here and they recommend editing cipher to "AES-256-CBC" instead of the default 'cipher' => MCRYPT_RIJNDAEL_128, but I get errors on that too. Looks like AES-256-CBC could not be recognized?

leokhoa

@Abigail-Banquil : Which github repo did you clone?
Did you try to generate a new key

php artisan key:generate

Abigail Banquil

@leokhoa

Hello
I got it working now.

php artisan key:generate

did not work because it detects AES-256-CBC as invalid.

I got it working by
Changing PHP version to 7.0 instead of 7.1