Remove last references to functional-php

module/Core/functions/array-utils.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\ArrayUtils;
+
+use function array_filter;
+use function array_reduce;
+use function in_array;
+
+use const ARRAY_FILTER_USE_KEY;
+
+function contains(mixed $value, array $array): bool
+{
+    return in_array($value, $array, strict: true);
+}
+
+/**
+ * @param array[] $multiArray
+ * @return array
+ */
+function flatten(array $multiArray): array
+{
+    return array_reduce(
+        $multiArray,
+        static fn (array $carry, array $value) => [...$carry, ...$value],
+        initial: [],
+    );
+}
+
+/**
+ * Checks if a callback returns true for at least one item in a collection.
+ * @param callable(mixed $value, mixed $key): bool $callback
+ */
+function some(iterable $collection, callable $callback): bool
+{
+    foreach ($collection as $key => $value) {
+        if ($callback($value, $key)) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+/**
+ * Checks if a callback returns true for all item in a collection.
+ * @param callable(mixed $value, string|number $key): bool $callback
+ */
+function every(iterable $collection, callable $callback): bool
+{
+    foreach ($collection as $key => $value) {
+        if (! $callback($value, $key)) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+/**
+ * Returns an array containing only those entries in the array whose key is in the supplied keys.
+ */
+function select_keys(array $array, array $keys): array
+{
+    return array_filter(
+        $array,
+        static fn (string $key) => contains(
+            $key,
+            $keys,
+        ),
+        ARRAY_FILTER_USE_KEY,
+    );
+}