Do the element types of php arrays have to be the same?

The element types of PHP arrays do not have to be the same; the element values ​​in the array can be of any type, such as strings, constants, etc. Only the key names in the array can only be of two types: numbers and strings. , the value of the element can be any data of different types.

The operating environment of this article: Windows 10 system, PHP version 8.1, Dell G3 computer

Do the element types of the php arrays have to be the same

The element types of PHP arrays do not have to be the same, they can be any data

The value in the array can be of any type, but the key name key can only be numbers and characters string.

var_dump(array(123, 'abc'));
array(2) {
  [0]=>
  int(123)
  [1]=>
  string(3) "abc"
}

Array elements can also be arrays.

$arr = array(1,'abc','ok'=>'678',array('1','2','3'));

Can be of different types.

An array is a collection of data that organizes a series of data to form an operable whole. Arrays can contain a lot of data, such as scalar arrays, arrays, objects, resources, and other syntax structures supported in PHP. Linear motor price

Each data in the array is called an element. The element includes two parts: index (key name) and value. The index of the element can be composed of a number or a string, and the value of the element can be of multiple types. Data type, the syntax format for defining an array is as follows

You can use the array() language structure to create a new array. Use commas to separate each array element

$array=('value1','value2'......)

or

$array[key]='value'

or

$array=array(key1=>value1,key2=>value2......)

Parameter details:

The parameter key is the subscript of the array element, value is the element corresponding to the array subscript.

Type of php array

• Index array: The subscript of the array is a number;

• Associative array: An array whose subscript is a character is an associative array;

• Multidimensional array: an array containing one or more arrays;

Note: Arrays in PHP actually do not distinguish between indexes and associative arrays. The corresponding key value is found based on the key name.

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of Do the element types of php arrays have to be the same?. For more information, please follow other related articles on the PHP Chinese website!