PHP 8.4.0 RC4 available for testing

array_find

(PHP 8 >= 8.4.0)

array_findReturns the first element satisfying a callback function

Опис

array_find(array $array, callable $callback): mixed

array_find() returns the value of the first element of an array for which the given callback returns true. If no matching element is found the function returns null.

Параметри

array
The array that should be searched.
callback

The callback function to call to check each element, which must be

callback(mixed $value, mixed $key): bool
If this function returns true, the value is returned from array_find() and the callback will not be called for further elements.

Значення, що повертаються

The function returns the value of the first element for which the callback returns true. If no matching element is found the function returns null.

Приклади

Приклад #1 array_find() example

<?php
$array
= [
'a' => 'dog',
'b' => 'cat',
'c' => 'cow',
'd' => 'duck',
'e' => 'goose',
'f' => 'elephant'
];

// Find the first animal with a name longer than 4 characters.
var_dump(array_find($array, function (string $value) {
return
strlen($value) > 4;
}));

// Find the first animal whose name begins with f.
var_dump(array_find($array, function (string $value) {
return
str_starts_with($value, 'f');
}));

// Find the first animal where the array key is the first symbol of the animal.
var_dump(array_find($array, function (string $value, $key) {
return
$value[0] === $key;
}));

// Find the first animal where the array key matching a RegEx.
var_dump(array_find($array, function ($value, $key) {
return
preg_match('/^([a-f])$/', $key);
}));
?>

Поданий вище приклад виведе:

string(5) "goose"
NULL
string(3) "cow"
string(3) "dog"

Прогляньте також

  • array_find_key() - Returns the key of the first element satisfying a callback function
  • array_all() - Checks if all array elements satisfy a callback function
  • array_any() - Checks if at least one array element satisfies a callback function
  • array_filter() - Filters elements of an array using a callback function
  • array_reduce() - Iteratively reduce the array to a single value using a callback function
add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top