array_all

(PHP 8 >= 8.4.0)

array_all — Checks if all Array elements satisfy a callback function

Beschreibung

array_all(array $array, callable $callback): bool

array_all() returns true, if the given callback returns true for all elements. Otherwise the function returns false.

Parameter-Liste

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 false, false is returned from array_all() and the callback will not be called for further elements.

Rückgabewerte

The function returns true, if callback returns true for all elements. Otherwise the function returns false.

Beispiele

Beispiel #1 array_all() example

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

// Check, if all animal names are shorter than 12 letters.
var_dump(array_all($array, function (string $value) {
    return strlen($value) < 12;
}));

// Check, if all animal names are longer than 5 letters.
var_dump(array_all($array, function (string $value) {
    return strlen($value) > 5;
}));

// Check, if all array keys are strings.
var_dump(array_all($array, function (string $value, $key) {
   return is_string($key);
}));
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

bool(true)
bool(false)
bool(true)

Siehe auch

array_any() - Checks if at least one Array element satisfies a callback function
array_filter() - Filtert Elemente eines Arrays mittels einer Callback-Funktion
array_find() - Returns the first element satisfying a callback function
array_find_key() - Returns the key of the first element satisfying a callback function

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