合并两个数组

Question

合并两个数组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

Answer 1

你应该考虑到这一点 $array1 + $array2 != $array2 + $array1

$array1 = array(

'11' => 'x1',

'22' => 'x1' 

);  

$array2 = array(

'22' => 'x2',

'33' => 'x2' 

);

使用$ array1 + $ array2

$array1 + $array2 = array(

'11' => 'x1',

'22' => 'x1',

'33' => 'x2'

);

和$ array2 + $ array1

$array2 + $array1 = array(  

'11' => 'x1',  

'22' => 'x2',  

'33' => 'x2'  

);

Answer 2

这有效：

$output = $array1 + $array2;