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：
1.相加会证数组中的自然index不被重置2.相加方法中，被加的数组内的值不会被覆盖3.merge函数中的自然index会被重置4.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：
$arr1 = array( 10 => "valueof10", 11 => "valueof11", "key1" => "dataofkey1", "key2" => "dataofkey2", "array" => array( "key1" => 1, "key2" => "abc", "key3" => array( 1, 2, "name" => "peter" ), ),);
数组2：
$arr2 = array( 10 => "newvalueof10", 11 => "newvalueof11", "key1" => "newdataofkey1", "key3" => "newdataofkey3", "array" => array( "key1" => 2, "key2" => "defg", "key3" => array( 1, 2, "name" => "jonathan", "gender" => "male" ), ),);
结果比较：
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)
