<?php
$a = array("a"=>1,"b"=>2,"c"=>3);
$b = array("aa"=>1,"22"=>2,"cc"=>3);
$data = array_merge($a,$b);
print_r($data);
$data2 = $a + $b;
print_r($data2);
?>结果：
Array
(
[a] => 1
[b] => 2
[c] => 3
[aa] => 1
[0] => 2
[cc] => 3
)
Array
(
[a] => 1
[b] => 2
[c] => 3
[aa] => 1
[22] => 2
[cc] => 3
)
array_merge：数字键名将会被重新编号！如果你想完全保留原有数组并只想新的数组附加到后面，用
+运算符。
