Php new array

In PHP, you can create a new array in several ways:

Using the array() function:
```
$array = array('key1' => 'value1', 'key2' => 'value2');
```
This creates a new array with the specified key-value pairs.
Using the [] syntax:
```
$array = ['key1' => 'value1', 'key2' => 'value2'];
```
This is a more concise way to create an array, and is available in PHP 5.4 and later.
Using the array() constructor:
```
$array = new ArrayObject(array('key1' => 'value1', 'key2' => 'value2'));
```
This creates a new ArrayObject instance, which is a more advanced type of array that supports additional features.
Using the [] syntax with a single value:
```
$array = ['value1', 'value2'];
```
This creates a new array with the specified values, and is often used when you need to create an array with a variable number of elements.

Using the array_merge() function:

$array1 = array('key1' => 'value1');
$array2 = array('key2' => 'value2');
$array = array_merge($array1, $array2);

This creates a new array by merging two existing arrays.

Note that in PHP, arrays are a type of data structure that can store multiple values, and are often used to represent collections of data.