PHP array is a set of key-value pairs, where each value can be accessed by a unique key. In PHP, there are two types of arrays: one-dimensional arrays and multi-dimensional arrays. One-dimensional arrays have only one value, while multi-dimensional arrays can contain multiple arrays. This article will introduce how to add data to a one-dimensional array.
One-dimensional array is one of the most common types in PHP. Creating a one-dimensional array using PHP is very simple. Here are some examples:
// 创建一个空数组 $myArray = array(); // 创建一个带有值的数组 $myArray = array("apple", "banana", "orange");
Now, let’s say we want to add some new data to an existing one-dimensional array. We can do this using several built-in functions of PHP.
array_push()
Function array_push()
The function adds one or more values to the end of an array. Here is an example:
// 创建一个带有值的数组 $myArray = array("apple", "banana", "orange"); // 添加新的值到数组末尾 array_push($myArray, "grape", "mango"); // 打印新的数组 print_r($myArray);
The output of the above code is:
Array ( [0] => apple [1] => banana [2] => orange [3] => grape [4] => mango )
[]
Operator in PHP , you can use the []
operator to add a new value to the end of the array. For example:
// 创建一个带有值的数组 $myArray = array("apple", "banana", "orange"); // 使用[]运算符添加新值 $myArray[] = "grape"; $myArray[] = "mango"; // 打印新的数组 print_r($myArray);
The output result of the above code is the same as the array_push()
function:
Array ( [0] => apple [1] => banana [2] => orange [3] => grape [4] => mango )
array_unshift()
Function If you need to add a new value at the beginning of the array, you can use the array_unshift()
function. Here is an example:
// 创建一个带有值的数组 $myArray = array("apple", "banana", "orange"); // 在数组开头添加新值 array_unshift($myArray, "grape", "mango"); // 打印新的数组 print_r($myArray);
The output of the above code is:
Array ( [0] => grape [1] => mango [2] => apple [3] => banana [4] => orange )
Summary
In PHP, one-dimensional arrays can be easily manipulated using one of these built-in functions Add new value to . No matter which method you choose, you can use the same syntax to access and manipulate new array elements.
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