這篇文章主要介紹了PHP合並數組+號和array_merge的區別,PHP的數組融合一般有兩種做法,一種是直接使用加號相加,另一種則是使用array_merge函數進行相加,兩者之間有點區別,需要的朋友可以參考下
PHP的數組融合一般有兩種做法，一種是直接使用加號相加，另一種則是使用array_merge函數進行相加，兩者之間有點區別：
1.相加會證數組中的自然index不被重置
2.相加方法中，被加的數組內的值不會被覆蓋
3.merge函數中的自然index會被重置
4.merge函數，無所謂被merge和merge關系，越後面的array參數，其值，會覆蓋較前面的array參數相同鍵的值
例子：
數組1：
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1 2 3 4 5 6 7 8 9 10 11 12 13 $arr1 = array( 10 => 'valueof10', 11 => 'valueof11', 'key1' => 'dataofkey1', 'key2' => 'dataofkey2', 'array' => array( 'key1' => 1, 'key2' => 'abc', 'key3' => array( 1, 2, 'name' => 'peter' ), ), );數組2：
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1 2 3 4 5 6 7 8 9 10 11 12 13 $arr2 = array( 10 => 'newvalueof10', 11 => 'newvalueof11', 'key1' => 'newdataofkey1', 'key3' => 'newdataofkey3', 'array' => array( 'key1' => 2, 'key2' => 'defg', 'key3' => array( 1, 2, 'name' => 'jonathan', 'gender' => 'male' ), ), );結果比較：
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 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)
