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<?php namespace WonderPush\Util; if (count(get_included_files()) === 1) { http_response_code(403); exit(); } // Prevent direct access /** * Utility class for array manipulation. */ class ArrayUtil { /** * Flattens nested non-associative arrays, without preserving keys. * * Return `array()` if a non array argument has been given. * * @param array $nestedArrays The nested arrays to flatten. * @return array */ public static function flatten($nestedArrays) { $result = array(); if (is_array($nestedArrays)) { foreach($nestedArrays as $v) { if (is_array($v)) { $result = array_merge($result, self::flatten($v)); } else { $result[] = $v; } } } return $result; } /** * Return a given array key if it `isset` or a default value. * * Note: Using `isset` implies that if the key is present according to `array_key_exists()` * but is associated to the value `null`, the default value will be returned instead (which defaults to `null`). * * @param array $array The array to look into * @param integer|string $key The desired key * @param mixed $notSet The default value to return if the key is missing or its associated value is `null`. * @return mixed */ public static function getIfSet($array, $key, $notSet = null) { return isset($array[$key]) ? $array[$key] : $notSet; } /** * Utility function `!is_null()`. * @param mixed $var * @return boolean * @see filterNulls() */ public static function is_not_null($var) { return $var !== null; } /** * Filter null values from an array. * * This differs from `array_filter($array)` without callback in that a strict comparison is used for `null`, * so `0`, `false`, `""`, `array()` and the like will not be filtered out. * * @param array $array * @return array */ public static function filterNulls($array) { return array_filter($array, '\WonderPush\Util\ArrayUtil::is_not_null'); } }
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