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<?php |
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namespace Spatie; |
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/** |
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* Get a random value from an array. |
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* |
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* @param array $array |
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* @param int $numReq The amount of values to return |
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* |
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* @return mixed |
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*/ |
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function array_rand_value(array $array, $numReq = 1) |
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{ |
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if (!count($array)) { |
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return; |
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} |
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$keys = array_rand($array, $numReq); |
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if ($numReq === 1) { |
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return $array[$keys]; |
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} |
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return array_intersect_key($array, array_flip($keys)); |
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} |
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/** |
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* Get a random value from an array, with the ability to skew the results. |
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* Example: array_rand_weighted(['foo' => 1, 'bar' => 2]) has a 66% chance of returning bar. |
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* |
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* @param array $array |
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* |
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* @return mixed |
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*/ |
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function array_rand_weighted(array $array) |
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{ |
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$array = array_filter($array, function ($item) { |
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return $item >= 1; |
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}); |
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if (!count($array)) { |
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return; |
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} |
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$totalWeight = array_sum($array); |
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foreach ($array as $value => $weight) { |
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if (rand(1, $totalWeight) <= $weight) { |
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return $value; |
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} |
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$totalWeight -= $weight; |
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} |
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} |
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/** |
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* Determine if all given needles are present in the haystack. |
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* |
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* @param array|string $needles |
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* @param array $haystack |
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* |
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* @return bool |
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*/ |
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function values_in_array($needles, array $haystack) |
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{ |
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if (!is_array($needles)) { |
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$needles = [$needles]; |
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} |
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return count(array_intersect($needles, $haystack)) === count($needles); |
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} |
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/** |
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* Determine if all given needles are present in the haystack as array keys. |
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* |
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* @param array|string $needles |
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* @param array $haystack |
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* |
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* @return bool |
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*/ |
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function array_keys_exist($needles, array $haystack) |
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{ |
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if (!is_array($needles)) { |
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return array_key_exists($needles, $haystack); |
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} |
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return values_in_array($needles, array_keys($haystack)); |
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} |
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/** |
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* Returns an array with two elements. |
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* |
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* Iterates over each value in the array passing them to the callback function. |
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* If the callback function returns true, the current value from array is returned in the first |
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* element of result array. If not, it is return in the second element of result array. |
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* |
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* Array keys are preserved. |
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* |
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* @param array $array |
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* @param callable $callback |
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* |
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* @return array |
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*/ |
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function array_split_filter(array $array, callable $callback) |
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{ |
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$passesFilter = array_filter($array, $callback); |
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$negatedCallback = static function ($item) use ($callback) { return !$callback($item); }; |
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$doesNotPassFilter = array_filter($array, $negatedCallback); |
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return [$passesFilter, $doesNotPassFilter]; |
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} |
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/** |
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* Split an array in the given amount of pieces. |
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* |
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* @param array $array |
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* @param int $numberOfPieces |
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* @param bool $preserveKeys |
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* @throws \InvalidArgumentException if the provided argument $numberOfPieces is lower than 1 |
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* |
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* @return array |
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*/ |
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function array_split(array $array, $numberOfPieces = 2, $preserveKeys = false) |
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{ |
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if ($numberOfPieces <= 0) { |
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throw new \InvalidArgumentException('Number of pieces parameter expected to be greater than 0'); |
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} |
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if (count($array) === 0) { |
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return []; |
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} |
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$splitSize = ceil(count($array) / $numberOfPieces); |
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return array_chunk($array, $splitSize, $preserveKeys); |
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} |
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/** |
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* Returns an array with the unique values from all the given arrays. |
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* |
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* @param \array[] $arrays |
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* |
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* @return array |
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*/ |
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function array_merge_values(array ...$arrays) |
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{ |
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$allValues = array_reduce($arrays, static function ($carry, $array) { |
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return array_merge($carry, $array); |
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}, []); |
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return array_values(array_unique($allValues)); |
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} |
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/** |
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* Flatten an array of arrays. The `$levels` parameter specifies how deep you want to |
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* recurse in the array. If `$levels` is -1, the function will recurse infinitely. |
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* |
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* @param array $array |
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* @param int $levels |
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* |
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* @return array |
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*/ |
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function array_flatten(array $array, $levels = -1) |
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{ |
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if ($levels === 0) { |
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return $array; |
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} |
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$flattened = []; |
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if ($levels !== -1) { |
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--$levels; |
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} |
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foreach ($array as $element) { |
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$flattened[] = is_array($element) ? array_flatten($element, $levels) : [$element]; |
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} |
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return array_merge([], ...$flattened); |
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} |
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spatie /
array-functions
