PHP returns all the values in the array to form an array

php editor Xinyi today introduces you to a common need in PHP: how to extract all the values in an array to form a new array. In PHP, we can use the array_values() function to achieve this function. This function will return a new array containing all the values of the original array, allowing us to further operate or process the array values. Next, let’s take a look at the specific implementation method!

Usearray_values()function

array_values()The function returns an array of all values in an array. It does not preserve the keys of the original array.

$array = ["foo" => "bar", "baz" => "qux"]; $values = array_values($array); // $values will be ["bar", "qux"]

Use loops

You can use a loop to manually get all the values of the array and add them to a new array.

$array = ["foo" => "bar", "baz" => "qux"]; $values = []; foreach ($array as $value) { $values[] = $value; } // $values will be ["bar", "qux"]

Userange()function

If the array is a continuous array from 0 to n-1, you can use therange()function to generate an array containing all values.

$array = range(0, 4); // $array will be [0, 1, 2, 3, 4]

Usearray_map()function

array_map()The function can apply a callback function to each value in the array. You can get all the values of an array by using an anonymous function.

$array = ["foo" => "bar", "baz" => "qux"]; $values = array_map(function ($value) { return $value; }, $array); // $values will be ["bar", "qux"]

Return the value of the associative array

If you need to return the value of an associative array, you can use thearray_column()function.

$array = ["foo" => "bar", "baz" => "qux"]; $values = array_column($array, "value"); // $values will be ["bar", "qux"]

Processing multi-dimensional arrays

If the array is multi-dimensional, you can use therecursivefunction to get all values.

function get_array_values($array) { $values = []; foreach ($array as $value) { if (is_array($value)) { $values = array_merge($values, get_array_values($value)); } else { $values[] = $value; } } return $values; }

Performance considerations

Performance considerations should be taken into consideration when choosing the method used to obtain all values of an array. For small arrays, a loop or thearray_map()function is usually the fastest option. For large arrays, thearray_values()function is usually the most efficient.

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