BaseArrayHelper.php 14.4 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
<?php
/**
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @link http://www.yiiframework.com/
 * @license http://www.yiiframework.com/license/
 */

namespace yii\helpers;

use Yii;
use yii\base\Arrayable;
use yii\base\InvalidParamException;

/**
 * BaseArrayHelper provides concrete implementation for [[ArrayHelper]].
 *
 * Do not use BaseArrayHelper. Use [[ArrayHelper]] instead.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class BaseArrayHelper
{
	/**
	 * Converts an object or an array of objects into an array.
	 * @param object|array $object the object to be converted into an array
	 * @param array $properties a mapping from object class names to the properties that need to put into the resulting arrays.
	 * The properties specified for each class is an array of the following format:
	 *
	 * ~~~
	 * [
	 *     'app\models\Post' => [
	 *         'id',
	 *         'title',
	 *         // the key name in array result => property name
	 *         'createTime' => 'create_time',
	 *         // the key name in array result => anonymous function
	 *         'length' => function ($post) {
	 *             return strlen($post->content);
	 *         },
	 *     ],
	 * ]
	 * ~~~
	 *
	 * The result of `ArrayHelper::toArray($post, $properties)` could be like the following:
	 *
	 * ~~~
	 * [
	 *     'id' => 123,
	 *     'title' => 'test',
	 *     'createTime' => '2013-01-01 12:00AM',
	 *     'length' => 301,
	 * ]
	 * ~~~
	 *
	 * @param boolean $recursive whether to recursively converts properties which are objects into arrays.
	 * @return array the array representation of the object
	 */
	public static function toArray($object, $properties = [], $recursive = true)
	{
		if (!empty($properties) && is_object($object)) {
			$className = get_class($object);
			if (!empty($properties[$className])) {
				$result = [];
				foreach ($properties[$className] as $key => $name) {
					if (is_int($key)) {
						$result[$name] = $object->$name;
					} else {
						$result[$key] = static::getValue($object, $name);
					}
				}
				return $result;
			}
		}
		if ($object instanceof Arrayable) {
			$object = $object->toArray();
			if (!$recursive) {
				return $object;
			}
		}
		$result = [];
		foreach ($object as $key => $value) {
			if ($recursive && (is_array($value) || is_object($value))) {
				$result[$key] = static::toArray($value, true);
			} else {
				$result[$key] = $value;
			}
		}
		return $result;
	}

	/**
	 * Merges two or more arrays into one recursively.
	 * If each array has an element with the same string key value, the latter
	 * will overwrite the former (different from array_merge_recursive).
	 * Recursive merging will be conducted if both arrays have an element of array
	 * type and are having the same key.
	 * For integer-keyed elements, the elements from the latter array will
	 * be appended to the former array.
	 * @param array $a array to be merged to
	 * @param array $b array to be merged from. You can specify additional
	 * arrays via third argument, fourth argument etc.
	 * @return array the merged array (the original arrays are not changed.)
	 */
	public static function merge($a, $b)
	{
		$args = func_get_args();
		$res = array_shift($args);
		while (!empty($args)) {
			$next = array_shift($args);
			foreach ($next as $k => $v) {
				if (is_integer($k)) {
					isset($res[$k]) ? $res[] = $v : $res[$k] = $v;
				} elseif (is_array($v) && isset($res[$k]) && is_array($res[$k])) {
					$res[$k] = self::merge($res[$k], $v);
				} else {
					$res[$k] = $v;
				}
			}
		}
		return $res;
	}

	/**
	 * Retrieves the value of an array element or object property with the given key or property name.
	 * If the key does not exist in the array, the default value will be returned instead.
	 *
	 * Below are some usage examples,
	 *
	 * ~~~
	 * // working with array
	 * $username = \yii\helpers\ArrayHelper::getValue($_POST, 'username');
	 * // working with object
	 * $username = \yii\helpers\ArrayHelper::getValue($user, 'username');
	 * // working with anonymous function
	 * $fullName = \yii\helpers\ArrayHelper::getValue($user, function($user, $defaultValue) {
	 *     return $user->firstName . ' ' . $user->lastName;
	 * });
	 * ~~~
	 *
	 * @param array|object $array array or object to extract value from
	 * @param string|\Closure $key key name of the array element, or property name of the object,
	 * or an anonymous function returning the value. The anonymous function signature should be:
	 * `function($array, $defaultValue)`.
	 * @param mixed $default the default value to be returned if the specified key does not exist
	 * @return mixed the value of the element if found, default value otherwise
	 */
	public static function getValue($array, $key, $default = null)
	{
		if ($key instanceof \Closure) {
			return $key($array, $default);
		} elseif (is_array($array)) {
			return isset($array[$key]) || array_key_exists($key, $array) ? $array[$key] : $default;
		} else {
			return $array->$key;
		}
	}

	/**
	 * Removes an item from an array and returns the value. If the key does not exist in the array, the default value
	 * will be returned instead.
	 *
	 * Usage examples,
	 *
	 * ~~~
	 * // $array = ['type' => 'A', 'options' => [1, 2]];
	 * // working with array
	 * $type = \yii\helpers\ArrayHelper::remove($array, 'type');
	 * // $array content
	 * // $array = ['options' => [1, 2]];
	 * ~~~
	 *
	 * @param array $array the array to extract value from
	 * @param string $key key name of the array element
	 * @param mixed $default the default value to be returned if the specified key does not exist
	 * @return mixed|null the value of the element if found, default value otherwise
	 */
	public static function remove(&$array, $key, $default = null)
	{
		if (is_array($array) && (isset($array[$key]) || array_key_exists($key, $array))) {
			$value = $array[$key];
			unset($array[$key]);
			return $value;
		}
		return $default;
	}

	/**
	 * Indexes an array according to a specified key.
	 * The input array should be multidimensional or an array of objects.
	 *
	 * The key can be a key name of the sub-array, a property name of object, or an anonymous
	 * function which returns the key value given an array element.
	 *
	 * If a key value is null, the corresponding array element will be discarded and not put in the result.
	 *
	 * For example,
	 *
	 * ~~~
	 * $array = [
	 *     ['id' => '123', 'data' => 'abc'],
	 *     ['id' => '345', 'data' => 'def'],
	 * ];
	 * $result = ArrayHelper::index($array, 'id');
	 * // the result is:
	 * // [
	 * //     '123' => ['id' => '123', 'data' => 'abc'],
	 * //     '345' => ['id' => '345', 'data' => 'def'],
	 * // ]
	 *
	 * // using anonymous function
	 * $result = ArrayHelper::index($array, function ($element) {
	 *     return $element['id'];
	 * });
	 * ~~~
	 *
	 * @param array $array the array that needs to be indexed
	 * @param string|\Closure $key the column name or anonymous function whose result will be used to index the array
	 * @return array the indexed array
	 */
	public static function index($array, $key)
	{
		$result = [];
		foreach ($array as $element) {
			$value = static::getValue($element, $key);
			$result[$value] = $element;
		}
		return $result;
	}

	/**
	 * Returns the values of a specified column in an array.
	 * The input array should be multidimensional or an array of objects.
	 *
	 * For example,
	 *
	 * ~~~
	 * $array = [
	 *     ['id' => '123', 'data' => 'abc'],
	 *     ['id' => '345', 'data' => 'def'],
	 * ];
	 * $result = ArrayHelper::getColumn($array, 'id');
	 * // the result is: ['123', '345']
	 *
	 * // using anonymous function
	 * $result = ArrayHelper::getColumn($array, function ($element) {
	 *     return $element['id'];
	 * });
	 * ~~~
	 *
	 * @param array $array
	 * @param string|\Closure $name
	 * @param boolean $keepKeys whether to maintain the array keys. If false, the resulting array
	 * will be re-indexed with integers.
	 * @return array the list of column values
	 */
	public static function getColumn($array, $name, $keepKeys = true)
	{
		$result = [];
		if ($keepKeys) {
			foreach ($array as $k => $element) {
				$result[$k] = static::getValue($element, $name);
			}
		} else {
			foreach ($array as $element) {
				$result[] = static::getValue($element, $name);
			}
		}

		return $result;
	}

	/**
	 * Builds a map (key-value pairs) from a multidimensional array or an array of objects.
	 * The `$from` and `$to` parameters specify the key names or property names to set up the map.
	 * Optionally, one can further group the map according to a grouping field `$group`.
	 *
	 * For example,
	 *
	 * ~~~
	 * $array = [
	 *     ['id' => '123', 'name' => 'aaa', 'class' => 'x'],
	 *     ['id' => '124', 'name' => 'bbb', 'class' => 'x'],
	 *     ['id' => '345', 'name' => 'ccc', 'class' => 'y'],
	 * );
	 *
	 * $result = ArrayHelper::map($array, 'id', 'name');
	 * // the result is:
	 * // [
	 * //     '123' => 'aaa',
	 * //     '124' => 'bbb',
	 * //     '345' => 'ccc',
	 * // ]
	 *
	 * $result = ArrayHelper::map($array, 'id', 'name', 'class');
	 * // the result is:
	 * // [
	 * //     'x' => [
	 * //         '123' => 'aaa',
	 * //         '124' => 'bbb',
	 * //     ],
	 * //     'y' => [
	 * //         '345' => 'ccc',
	 * //     ],
	 * // ]
	 * ~~~
	 *
	 * @param array $array
	 * @param string|\Closure $from
	 * @param string|\Closure $to
	 * @param string|\Closure $group
	 * @return array
	 */
	public static function map($array, $from, $to, $group = null)
	{
		$result = [];
		foreach ($array as $element) {
			$key = static::getValue($element, $from);
			$value = static::getValue($element, $to);
			if ($group !== null) {
				$result[static::getValue($element, $group)][$key] = $value;
			} else {
				$result[$key] = $value;
			}
		}
		return $result;
	}

	/**
	 * Sorts an array of objects or arrays (with the same structure) by one or several keys.
	 * @param array $array the array to be sorted. The array will be modified after calling this method.
	 * @param string|\Closure|array $key the key(s) to be sorted by. This refers to a key name of the sub-array
	 * elements, a property name of the objects, or an anonymous function returning the values for comparison
	 * purpose. The anonymous function signature should be: `function($item)`.
	 * To sort by multiple keys, provide an array of keys here.
	 * @param boolean|array $descending whether to sort in descending or ascending order. When
	 * sorting by multiple keys with different descending orders, use an array of descending flags.
	 * @param integer|array $sortFlag the PHP sort flag. Valid values include
	 * `SORT_REGULAR`, `SORT_NUMERIC`, `SORT_STRING`, `SORT_LOCALE_STRING`, `SORT_NATURAL` and `SORT_FLAG_CASE`.
	 * Please refer to [PHP manual](http://php.net/manual/en/function.sort.php)
	 * for more details. When sorting by multiple keys with different sort flags, use an array of sort flags.
	 * @param boolean|array $caseSensitive whether to sort string in case-sensitive manner. This parameter
	 * is used only when `$sortFlag` is `SORT_STRING`.
	 * When sorting by multiple keys with different case sensitivities, use an array of boolean values.
	 * @throws InvalidParamException if the $descending or $sortFlag parameters do not have
	 * correct number of elements as that of $key.
	 */
	public static function multisort(&$array, $key, $descending = false, $sortFlag = SORT_REGULAR, $caseSensitive = true)
	{
		$keys = is_array($key) ? $key : [$key];
		if (empty($keys) || empty($array)) {
			return;
		}
		$n = count($keys);
		if (is_scalar($descending)) {
			$descending = array_fill(0, $n, $descending);
		} elseif (count($descending) !== $n) {
			throw new InvalidParamException('The length of $descending parameter must be the same as that of $keys.');
		}
		if (is_scalar($sortFlag)) {
			$sortFlag = array_fill(0, $n, $sortFlag);
		} elseif (count($sortFlag) !== $n) {
			throw new InvalidParamException('The length of $sortFlag parameter must be the same as that of $keys.');
		}
		if (is_scalar($caseSensitive)) {
			$caseSensitive = array_fill(0, $n, $caseSensitive);
		} elseif (count($caseSensitive) !== $n) {
			throw new InvalidParamException('The length of $caseSensitive parameter must be the same as that of $keys.');
		}
		$args = [];
		foreach ($keys as $i => $key) {
			$flag = $sortFlag[$i];
			$cs = $caseSensitive[$i];
			if (!$cs && ($flag === SORT_STRING)) {
				$flag = $flag | SORT_FLAG_CASE;
				$args[] = static::getColumn($array, $key);
			} else {
				$args[] = static::getColumn($array, $key);
			}
			$args[] = $descending[$i] ? SORT_DESC : SORT_ASC;
			$args[] = $flag;
		}
		$args[] = &$array;
		call_user_func_array('array_multisort', $args);
	}

	/**
	 * Encodes special characters in an array of strings into HTML entities.
	 * Both the array keys and values will be encoded.
	 * If a value is an array, this method will also encode it recursively.
	 * @param array $data data to be encoded
	 * @param boolean $valuesOnly whether to encode array values only. If false,
	 * both the array keys and array values will be encoded.
	 * @param string $charset the charset that the data is using. If not set,
	 * [[\yii\base\Application::charset]] will be used.
	 * @return array the encoded data
	 * @see http://www.php.net/manual/en/function.htmlspecialchars.php
	 */
	public static function htmlEncode($data, $valuesOnly = true, $charset = null)
	{
		if ($charset === null) {
			$charset = Yii::$app->charset;
		}
		$d = [];
		foreach ($data as $key => $value) {
			if (!$valuesOnly && is_string($key)) {
				$key = htmlspecialchars($key, ENT_QUOTES, $charset);
			}
			if (is_string($value)) {
				$d[$key] = htmlspecialchars($value, ENT_QUOTES, $charset);
			} elseif (is_array($value)) {
				$d[$key] = static::htmlEncode($value, $charset);
			}
		}
		return $d;
	}

	/**
	 * Decodes HTML entities into the corresponding characters in an array of strings.
	 * Both the array keys and values will be decoded.
	 * If a value is an array, this method will also decode it recursively.
	 * @param array $data data to be decoded
	 * @param boolean $valuesOnly whether to decode array values only. If false,
	 * both the array keys and array values will be decoded.
	 * @return array the decoded data
	 * @see http://www.php.net/manual/en/function.htmlspecialchars-decode.php
	 */
	public static function htmlDecode($data, $valuesOnly = true)
	{
		$d = [];
		foreach ($data as $key => $value) {
			if (!$valuesOnly && is_string($key)) {
				$key = htmlspecialchars_decode($key, ENT_QUOTES);
			}
			if (is_string($value)) {
				$d[$key] = htmlspecialchars_decode($value, ENT_QUOTES);
			} elseif (is_array($value)) {
				$d[$key] = static::htmlDecode($value);
			}
		}
		return $d;
	}
}