相关疑难解决方法(0)

我有两个像这样的数组:

array( 
'11' => '11',
'22' => '22',
'33' => '33',
'44' => '44'
);

array( 
'44' => '44',
'55' => '55',
'66' => '66',
'77' => '77'
);

我想组合这两个数组,使它不包含重复,并保留其原始键.例如输出应该是:

array( 
'11' => '11',
'22' => '22',
'33' => '33',
'44' => '44',
'55' => '55',
'66' => '66',
'77' => '77'
);

我试过这个,但它正在更改原来的密钥:

$output = array_unique( array_merge( $array1 , $array2 ) );

有解决方案吗