array_all

(PHP 8 >= 8.4.0)

array_all — Checks if all array elements satisfy a callback function

Description

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.

Parameters

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.

Return Values

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

Examples

Example #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);
}));
?>

The above example will output:

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

See Also

  • 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_find() - Returns the first element satisfying a callback function
  • array_find_key() - Returns the key of the first element satisfying a callback function