How to assign value to php array? Two ways to introduce

PHP is a commonly used server-side programming language with powerful array functions. In PHP, array is a very important data type that can be used to store multiple data values. In PHP, there are two main methods of array assignment. Let’s introduce them in detail below.

Method 1: Direct assignment

Arrays in PHP can be initialized using direct assignment. In this way, we use the array keyword, and then separate the data items that need to be stored in a pair of square brackets separated by commas. For example:

$array = array('apple', 'banana', 'orange');

In the above example, we used the array keyword, and then listed the three data items that need to be stored in square brackets, which are 'apple', 'banana' and 'orange'. The subscripts of this array start from 0 and increase.

We can access each data item stored in the array through the subscript of this array. For example, to access the first element in the array above (i.e. 'apple'), we can use index 0 to access:

echo $array[0];

This will output 'apple'.

In PHP 5.4 and above, we can also use square brackets to define an array. For example:

$array = ['apple', 'banana', 'orange'];

This has the same effect as the above example.

Method 2: Use the array() function

There is also an array assignment method in PHP, which is to use the array() function. This function creates a new array and inserts its elements into the array. For example:

$array = array();
$array[0] = 'apple';
$array[1] = 'banana';
$array[2] = 'orange';

In the above example, we used the array() function to create an empty array, and then inserted the data items that need to be stored one by one. The subscripts of this array also increase from 0.

We can use the subscript of this array to access each data item in it. For example, to access the third element in the above array (i.e. 'orange'), we can use subscript 2 to access:

echo $array[2];

This will output 'orange'.

Summary

In PHP, there are two main methods of array assignment: direct assignment and using the array() function. Direct assignment is the simplest way to specify the element values ​​while creating the array. Using the array() function requires you to create an empty array first and then insert elements one by one. No matter which method we choose, we can use the subscript of the array to access the elements in it.

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