Parse the differences between array_merge and array + array in php

This article provides a detailed analysis of the differences between array_merge and array + array in php. For more information, see

This article provides a detailed analysis of the differences between array_merge and array + array in php. For more information, see

Array_merge discards the key of the original number, retains the key in the string form, and then forms a new array. no matter whether the key name is the same, the Hong Kong server will not merge, unless the key name and value are the same and must also be a string type key, the key is merged. Array + array is no matter what the situation is, it will only put the data in the previous array first into the newly generated array, then, check whether the second array has more numbers than the first array. If there are more, add them to the Hong Kong virtual host. The number is only a number of Hong Kong servers. However, in this case, the second array will be added: $ a = array ('D' => 'aass ', 'E' => 'adsdfs', 'asd' => 'asdsdd ', 'ddfg' => 'dssdf ');

The Code is as follows:

$ B = array ('D' => 'adddd', 'adsdfs', 'asdfsdddd', 'D' => 'aass ');
$ D = $ a + $ B;
$ E = array_merge ($ a, $ B );
Var_dump ($ d );
Var_dump ($ e );

Print:
Array
'D' => string 'aass '(length = 4)
'E' => string 'adsdfs' (length = 6)
'Asd '=> string 'asdsdd' (length = 6)
'Ddfg' => string 'dssdf '(length = 5)
0 => string 'adsdfs' (length = 6)
1 => string 'asdfsddddd' (length = 10)
Array
'D' => string 'aass '(length = 4)
'E' => string 'adsdfs' (length = 6)
'Asd '=> string 'asdsdd' (length = 6)
'Ddfg' => string 'dssdf '(length = 5)
0 => string 'adsdfs' (length = 6)
1 => string 'asdfsddddd' (length = 10)