array_all

(PHP 8 >= 8.4.0)

array_all — Checks if all array elements satisfy a callback function

说明

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

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

参数

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.

返回值

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

示例

示例 #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);
}));
?>

以上示例会输出：

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

参见

array_any() - Checks if at least one array element satisfies a callback function
array_filter() - 使用回调函数过滤数组的元素
array_find() - Returns the first element satisfying a callback function
array_find_key() - Returns the key of the first element satisfying a callback function