PHP removes the key name from the array

In PHP, array is a very common data type that can be used to store a series of related data. In some cases, we may need to remove the key names of the array and keep only the key values. This article introduces several methods to achieve this function.

Method 1: Use the array_values ​​function

The array_values ​​function can return all the values ​​in an array and re-index the key name of the array. If the keys in the original array are numbers, the returned array will be numbered consecutively.

For example, there is an associative array:

$fruits = array("a" => "Apple", "b" => "Banana", "c" => "Cherry");

We can use the array_values ​​function to remove the key name:

$newFruits = array_values($fruits);

At this time, the value of $newFruits is:

Array (
    [0] => Apple
    [1] => Banana
    [2] => Cherry
)

You can see that the key names in the new array have been removed, leaving only the key values.

Method 2: Use foreach loop

Another method is through foreach loop. The specific steps are as follows:

1. Create a new array
2. Use a foreach loop to traverse the original array and store each value in the original array into the new array

For example, there is an associative array:

$fruits = array("a" => "Apple", "b" => "Banana", "c" => "Cherry");

We can use a foreach loop to remove the key name:

$newFruits = array();
foreach ($fruits as $value) {
    array_push($newFruits, $value);
}

At this time, the value of $newFruits is also:

Array (
    [0] => Apple
    [1] => Banana
    [2] => Cherry
)

As you can see, by traversing the original array through a foreach loop and storing each value in the original array into a new array, the key name can be removed.

Method 3: Use the array_map function

Finally, we can also use the array_map function to remove the array key name.

$fruits = array("a" => "Apple", "b" => "Banana", "c" => "Cherry");
$newFruits = array_map(function($value) {
    return $value;
}, $fruits);

Here, we pass an anonymous function as the first parameter of array_map. The purpose of this function is to return the value in the original array.

The running result is also:

Array (
    [0] => Apple
    [1] => Banana
    [2] => Cherry
)

It can be found that by using the array_map function, we can also remove the key name of the array.

Summary

In PHP, to remove the key name of an array, we can use a variety of methods, such as array_values ​​function, foreach loop and array_map function. Which method to choose depends on personal habits and actual needs.

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