php rearrange array with only values

PHP is a widely used server-side scripting language and it is one of the most commonly used languages ​​in web development. In PHP, arrays are a very important concept used to store and manipulate multiple values. In PHP development, it is often necessary to reorganize arrays to retain only the values ​​in the array without retaining keys and other elements. Here is an article that explains how to use PHP to rearrange an array using only the values.

1. What is rearranging an array using only values?

Rearrange the array using only values. As the name suggests, all keys and other elements in the original array are removed, leaving only the values ​​in the array. This process is usually used in data processing, sorting, search and other scenarios.

For example, if we have an original array containing the following elements:

$originalArray = array(
    "apple" => 20,
    "banana" => 30,
    "orange" => 10,
    "grape" => 25
);

Using the method of rearranging the array with only values, we can get a new array containing only the values ​​in this array:

$newArray = array(20, 30, 10, 25);

2. Use the array_values() function to rearrange the array using only values

In PHP, there is a built-in function array_values(), which can use an array as a parameter and return a new array , containing only the values ​​in the original array, without any keys or other elements.

$newArray = array_values($originalArray);

This function is very simple and easy to use, but it should be noted that it will only return a new array and will not modify the original array. If you need to remove keys and other elements on the original array, you can use the unset() function.

foreach ($originalArray as $key => $value) {
    unset($originalArray[$key]);
}

This way, all keys and values ​​in the original array can be deleted without creating a new array.

3. Use the array_map() function to rearrange the array using only values

Another common method is to use the array_map() function. This function can pass each element in an array to a custom function and then return a new array in which each element is the value returned by the custom function.

Here, we can use an anonymous function to return only the values ​​​​in the original array:

$newArray = array_map(function($value) {
    return $value;
}, $originalArray);

Although this method requires writing more code, it can control the new array more flexibly. value. For example, we can use string operations, mathematical calculations, conditional logic, etc. to modify the values ​​in the array and then return a new array.

4. Use a loop to rearrange the array using only the values

The last method is to use a loop to traverse the original array and store only the values ​​in the new array. Although this method requires manual writing of loops and conditional statements, it can better control the data processing process.

$newArray = array();
foreach ($originalArray as $value) {
    $newArray[] = $value;
}

This method is very simple, just need an empty array as a container, and then add each value to the end of the array.

5. Summary

In PHP development, rearranging arrays using only values ​​is a common requirement. This process is easy to implement, whether using built-in functions or manually writing loops. Different methods are suitable for different scenarios, and developers can choose the most appropriate method according to actual needs.

The above is the detailed content of php rearrange array with only values. For more information, please follow other related articles on the PHP Chinese website!