php数组合并：＋运算符、array_merge、array_merge_recursive的区别分析

2. $a = array(
3. 'a',
4. );
5. $b = array(
6. 'u',
7. );
8. $c = $a + $b;
9. var_dump($c);

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输出:

2. $a = array(
3. 66=>'a',
4. );
5. $b = array(
6. 60=>'u',
7. 66=>'c'
8. );
9. $c = $a + $b;
10. var_dump($c);

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输出:

2. $a = array(
3. 1=>'a',
4. 2=>'b',
5. 'c'=>'c',
6. 'd'=>'d',
7. );
8. $b = array(
9. 1=>'u',
10. 3=>'v',
11. 'c'=>'w',
12. 'd'=>'x',
13. 'y'=>'y',
14. 60=>'z',
15. );
16. $c = $a + $b;
17. var_dump($c);
18. ?>

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输出:

2. $a = array(
3. 'a',
4. );
5. $b = array(
6. 'u',
7. );
8. $c = array_merge($a, $b);
9. var_dump($c);

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输出:

2. $a = array(
3. 66=>'a',
4. );
5. $b = array(
6. 60=>'u',
7. 66=>'c'
8. );
9. $c = array_merge($a, $b);
10. var_dump($c);

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输出:

2. $a = array(
3. 1=>'a',
4. 2=>'b',
5. 'c'=>'c',
6. 'd'=>'d',
7. );
8. $b = array(
9. 1=>'u',
10. 3=>'v',
11. 'c'=>'w',
12. 'd'=>'x',
13. 'y'=>'y',
14. 60=>'z',
15. );
16. $c = array_merge($a, $b);
17. var_dump($c);

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输出:

2. $a = array(
3. 'a',
4. );
5. $b = array(
6. 'u',
7. );
8. $c = array_merge_recursive($a, $b);
9. var_dump($c);

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输出:

2. $a = array(
3. 'a',
4. );
5. $b = array(
6. 'u',
7. );
8. $c = array_merge_recursive($a, $b);
9. var_dump($c);

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输出:

2. $a = array(
3. 1=>'a',
4. 2=>'b',
5. 'c'=>'c',
6. 'd'=>'d',
7. );
8. $b = array(
9. 1=>'u',
10. 3=>'v',
11. 'c'=>'w',
12. 'd'=>'x',
13. 'y'=>'y',
14. 60=>'z',
15. );
16. $c = array_merge_recursive($a, $b);
17. var_dump($c);

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输出:

array(8) { [0]=> string(1) "a" [1]=> string(1) "b" ["c"]=> array(2) { [0]=> string(1) "c" [1]=> string(1) "w" } ["d"]=> array(2) { [0]=> string(1) "d" [1]=> string(1) "x" } [2]=> string(1) "u" [3]=> string(1) "v" ["y"]=> string(1) "y" [4]=> string(1) "z" }