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yii2-bootstrap/framework/yii/helpers/AbstractArrayHelper.php

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<?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;
/**
* AbstractArrayHelper provides concrete implementation for [[ArrayHelper]].
*
* Do not use AbstractArrayHelper. Use [[ArrayHelper]] instead.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
abstract class AbstractArrayHelper
{
/**
* 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 $properties a mapping from object class names to the properties that need to put into the resulting arrays.
* The properties specified for each class is an array of the following format:
*
* ~~~
* array(
* 'app\models\Post' => array(
* 'id',
* 'title',
* // the key name in array result => property name
* 'createTime' => 'create_time',
* // the key name in array result => anonymous function
* 'length' => function ($post) {
* return strlen($post->content);
* },
* ),
* )
* ~~~
*
* The result of `ArrayHelper::toArray($post, $properties)` could be like the following:
*
* ~~~
* array(
* '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 = array(), $recursive = true)
{
if (!empty($properties) && is_object($object)) {
$className = get_class($object);
if (!empty($properties[$className])) {
$result = array();
foreach ($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;
}
}
$result = array();
foreach ($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 = array('type' => 'A', 'options' => array(1, 2));
* // working with array
* $type = \yii\helpers\ArrayHelper::remove($array, 'type');
* // $array content
* // $array = array('options' => array(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 = array(
* array('id' => '123', 'data' => 'abc'),
* array('id' => '345', 'data' => 'def'),
* );
* $result = ArrayHelper::index($array, 'id');
* // the result is:
* // array(
* // '123' => array('id' => '123', 'data' => 'abc'),
* // '345' => array('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)
{
$result = array();
foreach ($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 = array(
* array('id' => '123', 'data' => 'abc'),
* array('id' => '345', 'data' => 'def'),
* );
* $result = ArrayHelper::getColumn($array, 'id');
* // the result is: array( '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)
{
$result = array();
if ($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 = array(
* array('id' => '123', 'name' => 'aaa', 'class' => 'x'),
* array('id' => '124', 'name' => 'bbb', 'class' => 'x'),
* array('id' => '345', 'name' => 'ccc', 'class' => 'y'),
* );
*
* $result = ArrayHelper::map($array, 'id', 'name');
* // the result is:
* // array(
* // '123' => 'aaa',
* // '124' => 'bbb',
* // '345' => 'ccc',
* // )
*
* $result = ArrayHelper::map($array, 'id', 'name', 'class');
* // the result is:
* // array(
* // 'x' => array(
* // '123' => 'aaa',
* // '124' => 'bbb',
* // ),
* // 'y' => array(
* // '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)
{
$result = array();
foreach ($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` and `SORT_LOCALE_STRING`.
* 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) ? $key : array($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.');
}
$args = array();
foreach ($keys as $i => $key) {
$flag = $sortFlag[$i];
$cs = $caseSensitive[$i];
if (!$cs && ($flag === SORT_STRING)) {
if (defined('SORT_FLAG_CASE')) {
$flag = $flag | SORT_FLAG_CASE;
$args[] = static::getColumn($array, $key);
} else {
$column = array();
foreach (static::getColumn($array, $key) as $k => $value) {
$column[$k] = mb_strtolower($value);
}
$args[] = $column;
}
} 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;
}
$d = array();
foreach ($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)
{
$d = array();
foreach ($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;
}
}