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<?php namespace Etc; /** * Determines whether any element of `$array` satisfies `$predicate` * * @param array $array The array * @param callable $predicate [optional] The predicate, accepting parameters `$value`, `$key`, returning `boolean` * @return boolean `TRUE` if any element satisfies `$predicate`, `FALSE` otherwise */ function array_any(array $array, callable $predicate = null) { $predicate = $predicate? : function ($value) { return !empty($value); }; foreach ($array as $key => $value) { if ((boolean) $predicate($value, $key)) { return true; } } return false; } /** * Determines whether all elements of `$array` satisfy `$predicate` * * @param array $array The array * @param callable $predicate [optional] The predicate, accepting parameters `$value`, `$key`, returning `boolean` * @return boolean `TRUE` if all elements satisfy `$predicate`, `FALSE` otherwise */ function array_all(array $array, callable $predicate = null) { $predicate = $predicate? : function ($value) { return !empty($value); }; foreach ($array as $key => $value) { if ((boolean) $predicate($value, $key)) { continue; } return false; } return true; } /** * Returns the first element value of `$array` that satisfies `$predicate` * * @param array $array * @param callable $predicate [optional] The predicate, accepting parameters `$value`, `$key`, returning `boolean` * @param mixed $default [optional] The value to return if no elements satisfy `$predicate` * @return mixed The element value, `$default` otherwise */ function array_first(array $array, callable $predicate = null, $default = null) { $predicate = $predicate? : function ($value) { return !empty($value); }; foreach ($array as $key => $value) { if ((boolean) $predicate($value, $key)) { return $value; } } return $default; } /** * Returns the first element key of `$array` that satisfies `$predicate` * * @param array $array The array * @param callable $predicate [optional] The predicate, accepting parameters `$value`, `$key`, returning `boolean` * @return mixed The element key, `NULL` otherwise */ function array_first_key(array $array, callable $predicate = null) { $predicate = $predicate? : function ($value) { return !empty($value); }; foreach ($array as $key => $value) { if ((boolean) $predicate($value, $key)) { return $key; } } return null; } /** * Returns the last element value of `$array` that satisfies `$predicate` * * @param array $array The array * @param callable $predicate [optional] The predicate, accepting parameters `$value`, `$key`, returning `boolean` * @param mixed $default [optional] The value to return if no elements satisfy `$predicate` * @return mixed The element value, `$default` otherwise */ function array_last(array $array, callable $predicate = null, $default = null) { $predicate = $predicate? : function ($value) { return !empty($value); }; foreach (array_reverse(array_keys($array)) as $key) { $value = $array[$key]; if ((boolean) $predicate($value, $key)) { return $value; } } return $default; } /** * Returns the last element key of $array` that satisfies `$predicate` * * @param array $array The array * @param callable $predicate [optional] The predicate, accepting parameters `$value`, `$key`, returning `boolean` * @return mixed The element key, `NULL` otherwise */ function array_last_key(array $array, callable $predicate = null) { $predicate = $predicate? : function ($value) { return !empty($value); }; foreach (array_reverse(array_keys($array)) as $key) { $value = $array[$key]; if ((boolean) $predicate($value, $key)) { return $key; } } return null; } var_dump(array_last_key([null, null, 'a', null]));