php associative array to array

PHP is a very popular server-side scripting language that has powerful associative array functions. Associative arrays are composed of key-value pairs. In PHP, we can use associative arrays to store and process various data. Sometimes, we need to convert an associative array into a normal array. What should we do at this time? This article will introduce how to convert PHP associative array into an array.

What is an associative array in PHP?

In PHP, an associative array is a type of array, which is characterized by using strings or numbers as key names. Unlike ordinary numeric arrays, associative array keys can be strings or any integer or floating point type.

PHP associative array consists of key-value pairs of "key" => "value". The key is usually a string, and the value can be any type of data, including strings, numbers, Boolean values, arrays, objects, etc.

The following is a simple PHP associative array example:

$student = array(
    "name" => "Tom",
    "age" => 18,
    "gender" => "male"
)

In the above example, the key names of the associative array $student are "name", "age" and "gender" respectively. The corresponding key values ​​are "Tom", 18 and "male" respectively.

How to convert PHP associative array into an array?

In PHP, we can use a variety of methods to convert associative arrays into arrays. The following are two common methods:

Method 1: Use the array_values() function

The array_values() function can return all the values ​​of an associative array. This return value is an array.

The following sample code shows how to use the array_values() function to convert the $student associative array into a normal array.

$student = array("name" => "Tom", "age" => 18, "gender" => "male");
$array = array_values($student);
print_r($array);

The output result will be:

Array
(
    [0] => Tom
    [1] => 18
    [2] => male
)

In the above code, we convert the associative array $student into a normal array $array by using the array_values() function. Contains the same values ​​as $student, but does not contain the key name, only the value.

Method 2: Use loops

In addition to using the array_values() function, we can also use loops to convert associative arrays into arrays. The following code demonstrates this approach:

$student = array("name" => "Tom", "age" => 18, "gender" => "male");
$array = array();

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

print_r($array);

In the above code, we use a foreach loop to traverse the $student associative array and assign each key value to the array $array. Finally, we output the $array array through the print_r() function.

Summary

There are many ways to convert PHP associative arrays to arrays. Among them, the array_values() function is one of the simplest methods. Alternatively, we can also do this by using a loop. In practical applications, we need to choose which method is most suitable based on needs. No matter which method is used, we can convert PHP associative arrays into ordinary arrays for better processing and use of related data.

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