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<?php |
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namespace WebServCo\Framework\Utils; |
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final class Arrays |
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{ |
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/** |
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* @param array[] $array |
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* @param mixed $value |
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*/ |
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public function has(?array $array, $value) : bool |
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{ |
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if (!is_array($array)) { |
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return false; |
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} |
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return in_array($value, $array); |
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} |
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/** |
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* @param array[] $array |
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* @param mixed $key |
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* @param mixed $defaultValue |
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* @return mixed |
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*/ |
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public static function get(array $array, $key, $defaultValue = false) |
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{ |
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if (!is_array($array)) { |
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return $defaultValue; |
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} |
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return array_key_exists($key, $array) ? $array[$key] : $defaultValue; |
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} |
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/** |
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* @param array[] $array |
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*/ |
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public static function isMultidimensional(array $array) : bool |
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{ |
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if (empty($array)) { |
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return false; |
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} |
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return is_array($array[key($array)]); |
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} |
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/** |
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* @param array<mixed> $array |
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* @return array[] |
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*/ |
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public static function nullToEmptyString(array $array) : array |
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{ |
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foreach ($array as $key => $value) { |
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if (is_null($value)) { |
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$array[$key] = ''; |
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} |
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} |
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return $array; |
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} |
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/** |
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* Array power set (all element combinations) |
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* |
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* Original function credit: |
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* "PHP Cookbook by David Sklar, Adam Trachtenberg" |
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* 4.24. Finding All Element Combinations of an Array |
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* https://www.oreilly.com/library/view/php-cookbook/1565926811/ch04s25.html |
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* @param array[] $array |
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* @return array[] |
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*/ |
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public static function powerSet(array $array) : array |
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{ |
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$results = [[]]; //initialize by adding the empty set |
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foreach ($array as $element) { |
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foreach ($results as $combination) { |
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array_push($results, array_merge([$element], $combination)); |
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} |
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} |
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// sort by number of elements descending |
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$array1 = array_map('count', $results); |
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array_multisort($array1, SORT_DESC, $results); |
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return array_filter($results); // removes empty elements |
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} |
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/** |
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* @param array<mixed> $array |
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*/ |
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public static function toUrlQueryString(array $array) : ?string |
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{ |
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if (empty($array)) { |
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return null; |
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} |
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$queries = []; |
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foreach ($array as $k => $v) { |
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$queries[] = sprintf('%s=%s', $k, $v); |
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} |
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return '?' . implode('&', $queries); |
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} |
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} |
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webservco /
framework
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