PHP的数组融合一般有两种做法,一种是直接使用加号相加,另一种则是使用array_merge函数进行相加,两者之间有点区别:

  • 相加会证数组中的自然index不被重置
  • 相加方法中,被加的数组内的值不会被覆盖
  • merge函数中的自然index会被重置
  • merge函数,无所谓被merge和merge关系,越后面的array参数,其值,会覆盖较前面的array参数相同键的值

例子:

数组1:

[codesyntax lang="php"]

$arr1 = array(
    10 => 'valueof10',
    11 => 'valueof11',
    'key1' => 'dataofkey1',
    'key2' => 'dataofkey2',
    'array' => array(
        'key1' => 1,
        'key2' => 'abc',
        'key3' => array(
            1, 2, 'name' => 'peter'
        ),
    ),
);

[/codesyntax]

数组2:

[codesyntax lang="php"]

$arr2 = array(
    10 => 'newvalueof10',
    11 => 'newvalueof11',
    'key1' => 'newdataofkey1',
    'key3' => 'newdataofkey3',
    'array' => array(
        'key1' => 2,
        'key2' => 'defg',
        'key3' => array(
            1, 2, 'name' => 'jonathan', 'gender' => 'male'
        ),
    ),
);

[/codesyntax]

结果比较:

[codesyntax lang="php"]

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)

[/codesyntax]