PHP returns all the values ??in the array to form an array
Mar 21, 2024 am 09:06 AM
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!
Use array_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"]
Use range() function
If the array is a continuous array from 0 to n-1, you can use the range() function to generate an array containing all values.
$array = range(0, 4); // $array will be [0, 1, 2, 3, 4]
Use array_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 the array_column() function.
$array = ["foo" => "bar", "baz" => "qux"]; $values ??= array_column($array, "value"); // $values ??will be ["bar", "qux"]
Processing multi-dimensional arrays
If the array is multi-dimensional, you can use the recursive function to get all values.
function get_array_values($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 the array_map() function is usually the fastest option. For large arrays, the array_values() function is usually the most efficient.
The above is the detailed content of PHP returns all the values ??in the array to form an array. For more information, please follow other related articles on the PHP Chinese website!
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