PHP array_merge () function
Examples
The two arrays into one array:
$a1=array("a"=>"red","b"=>"green");
$a2=array("c"=>"blue","b"=>"yellow");
print_r(array_merge($a1,$a2));
?>
Running instance »
Definition and Usage
array_merge () function is used to one or more arrays into one array.
Tip: You can enter a function to one or more arrays.
NOTE: If two or more of the array elements have the same key name, the last element will overwrite other elements.
NOTE: If you only () function to input an array array_merge, and the key name is an integer, the function will return a new array with integer keys, the keys to re-index 0 (see Example 1 below) .
Tip: This function array_merge_recursive () between different functions in the process two or more of the array elements have the same situation of keys. array_merge_recursive () will not be covering the key name, but multiple values with the same key name recursively composed of an array.
grammar
| 参数 | 描述 |
|---|---|
| array1 | 必需。规定数组。 |
| array2 | 可选。规定数组。 |
| array3 | 可选。规定数组。 |
technical details
| return value: | Returns an array of the merger. |
|---|---|
| PHP version: | 4+ |
| Update log: | As of PHP 5.0, the function only accepts parameters of type array. |
More examples
Example 1
Only use a parameter with integer key names:
$a=array(3=>"red",4=>"green");
print_r(array_merge($a));
?>
Running instance »
Complete PHP Array Reference