PHP Array_merge ()

Definition and usage

The Array_merge () function merges two or more arrays into an array.

If the key name is duplicated, the key's key value is the value corresponding to the last key name (followed by overwriting the previous one). If the array is a numeric index, the key name is re-indexed in a sequential manner.

Note: If you only enter an array into the Array_merge () function and the key name is an integer, the function returns a new array with an integer key name, with the key name re-indexed starting at 0. (see Example 2)

Grammar

Array_merge (Array1,array2,array3 ...)

Parameters	Describe
Array1	Necessary. The first array entered.
Array2	Necessary. The second array entered.
Array3	Optional. Multiple input arrays that can be specified.

Example 1

<?php$a1 = Array ("A" = "Horse", "b" = "Dog"), $a 2 = array ("c" = "Cow", "b" = "Cat");p Rint_r (Array_merge ($ A1, $a 2));? >

Output:

Array ([A] = Horse [b] = Cat [c] = Cow)

Example 2

Use only one array parameter:

<?php$a = Array (3=> "Horse",4=> "Dog");p Rint_r (Array_merge ($a));? >

Output:

Array ([0] = Horse [1] = Dog)

　　

PHP Array_merge ()