PHP array_filter()

Filter elements using callback

Function Signature

array array_filter(array $array, ?callable $callback = null, int $mode = 0)

Description

Filter elements using callback. The array_filter() function is commonly used in PHP for array operations and provides reliable functionality across all PHP versions.

Return Value

Returns filtered array

Example Usage

 $n > 2);
var_dump($result);
?>

Important Notes

Without callback, removes false values. Keys are preserved.

Common Use Cases

The array_filter() function is particularly useful when you need to filter elements using callback. It's frequently used in data processing, validation, transformation, and manipulation tasks throughout PHP applications.

array_filter() FAQ

What does array_filter() return?

Returns filtered array

When should I use array_filter()?

Use array_filter() when you need to filter elements using callback in your PHP code. It's a reliable built-in function available in all PHP versions.

Are there any gotchas with array_filter()?

Without callback, removes false values. Keys are preserved.