[ 0 => '0xfffffffff4', 1 => '0x4',]
[ 'result' => [ 'resource' => 'GMP instance', 'string' => '4', ], 'php_version' => '7.1.33 Linux x86_64',]
[ 0 => '0xfffffffff4', 1 => '0x8',]
[ 'result' => [ 'resource' => 'GMP instance', 'string' => '0', ], 'php_version' => '7.1.33 Linux x86_64',]