PHP合并数组+号和array_merge的区别

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$arr1 = array(

10 => 'valueof10',

11 => 'valueof11',

'key1' => 'dataofkey1',

'key2' => 'dataofkey2',

'array' => array(

'key1' => 1,

'key2' => 'abc',

'key3' => array(

1, 2, 'name' => 'peter'

),

),

);

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$arr2 = array(

10 => 'newvalueof10',

11 => 'newvalueof11',

'key1' => 'newdataofkey1',

'key3' => 'newdataofkey3',

'array' => array(

'key1' => 2,

'key2' => 'defg',

'key3' => array(

1, 2, 'name' => 'jonathan', 'gender' => 'male'

),

),

);

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array (size=6)

10 => string 'valueof10' (length=9)

11 => string 'valueof11' (length=9)

'key1' => string 'dataofkey1' (length=10)

'key2' => string 'dataofkey2' (length=10)

'array' =>

array (size=3)

'key1' => int 1

'key2' => string 'abc' (length=3)

'key3' =>

array (size=3)

0 => int 1

1 => int 2

'name' => string 'peter' (length=5)

'key3' => string 'newdataofkey3' (length=13)

array (size=8)

0 => string 'valueof10' (length=9)

1 => string 'valueof11' (length=9)

'key1' => string 'newdataofkey1' (length=13)

'key2' => string 'dataofkey2' (length=10)

'array' =>

array (size=3)

'key1' => int 2

'key2' => string 'defg' (length=4)

'key3' =>

array (size=4)

0 => int 1

1 => int 2

'name' => string 'jonathan' (length=8)

'gender' => string 'male' (length=4)

2 => string 'newvalueof10' (length=12)

3 => string 'newvalueof11' (length=12)

'key3' => string 'newdataofkey3' (length=13)