Get the first key from the current array.
/**
* Get the first key from the current array.
*
* @return mixed Returns the first key of array if the array is not empty; NULL otherwise.
*/
public function firstKey()
Examples
$arrays = Arrays::create([
'the_thin_red_line' => [
'title' => 'The Thin Red Line',
'directed_by' => 'Terrence Malick',
'produced_by' => 'Robert Michael, Geisler Grant Hill, John Roberdeau',
'decription' => 'Adaptation of James Jones autobiographical 1962 novel, focusing on the conflict at Guadalcanal during the second World War.'
],
'bad_times_at_the_el_royale' => [
'title' => 'Bad Times at the El Royale',
'directed_by' => 'Drew Goddard',
'produced_by' => 'Drew Goddard, Steve Asbell',
'decription' => 'Early 1970s. Four strangers check in at the El Royale Hotel. The hotel is deserted, staffed by a single desk clerk. Some of the new guests reasons for being there are less than innocent and some are not who they appear to be.'
]
]);
$result = $arrays->firstKey();
print_r($result);
The above example will output:
the_thin_red_line
Getting Started
Methods
- all Get all items from stored array.
- append Push an item into the end of an array.
- chunk Create a chunked version of current array.
- column Get the values of a single column from an arrays items.
- combine Create an array using the current array as keys and the other array as values.
- copy Creates a new Arrays object with the same items.
- count Return the number of items in a given key.
- create Create a new arrayable object from the given elements.
- createFromJson Create a new arrayable object from the given JSON string.
- createFromString Create a new arrayable object from the given string.
- createWithRange Create a new arrayable object from the given string.
- current Gets the element of the array at the current internal iterator position.
- customSortKeys Sorts the array keys with a user-defined comparison function and maintain index association.
- customSortValues Sorts the array values with a user-defined comparison function and maintain index association.
- dd Dumps the arrays items using the given function (print_r by default) and die.
- delete Deletes an array value using "dot notation".
- diff Compute the current array values which not present in the given one.
- divide Divide an array into two arrays.
- dot Flatten a multi-dimensional associative array with dots.
- dump Dumps the arrays items using the given function (print_r by default).
- every Verifies that all elements pass the test of the given callback.
- except Return slice of an array with just a given keys.
- extract Extract the items from the current array using "dot" notation for further manipulations.
- filter Filter the current array for elements satisfying the predicate $callback function.
- first Get the first value from the current array.
- firstKey Get the first key from the current array.
- flip Exchanges all keys of current array with their associated values.
- flush Flush all values from the array.
- get Get an item from an array using "dot" notation.
- getIterator Create a new iterator from an ArrayObject instance.
- getValues Return an array of all values stored array.
- groupBy Groups the array items by a given key.
- has Checks if the given dot-notated key exists in the array.
- indexOf Alias of search() method. Search for a given item and return the index of its first occurrence.
- intersect Compute the current array values which present in the given one.
- intersectAssoc Compute the current array values with additional index check.
- intersectKey Compute the current array using keys for comparison which present in the given one.
- isAssoc Determines if an array is associative.
- isEmpty Check whether the array is empty or not.
- isEqual Check if the current array is equal to the given $array or not.
- last Get the last value from the current array.
- lastKey Get the last key from the current array.
- limit Extract a slice of the current array with offset 0 and specific length.
- map Apply the given $callback function to the every element of the current array, collecting the results.
- merge Merge the current array with the provided one.
- next Moves the internal iterator position to the next element and returns this element.
- nth Extract array items with every nth item from the array.
- offset Extract a slice of the current array with specific offset.
- offsetExists Whether an offset exists.
- offsetGet Offset to retrieve.
- offsetSet Assign a value to the specified offset.
- offsetUnset Unset an offset.
- only Return slice of an array with just a given keys.
- pad Pad the current array to the specified size with a given value.
- pipe Passes the array to the given callback and return the result.
- prepend Push an item into the beginning of an array.
- prev Rewind the internal iterator position and returns this element.
- product Calculate the product of values in the current array.
- pull Get a value from the array, and remove it.
- random Returns one or a specified number of items randomly from the array.
- reduce Reduce the array to a single value iteratively combining all values using $callback.
- reindex Create a numerically re-indexed array based on the current array.
- replace Replace values in the current array with values in the given one that have the same key.
- reverse Reverse the values order of the current array.
- search Searches the array for a given value and returns the first corresponding key if successful.
- set Set an array item to a given value using "dot" notation.
- shuffle Shuffle the given array and return the result.
- skip Skip the first count items.
- slice Extract a slice of the current array.
- sort Sorts a associative array by a certain sub key.
- sortBy Sorts a associative array by a certain key.
- sortKeys Sorts array by keys.
- sum Calculate the sum of values in the current array.
- toArray Get all items from stored array and convert them to array.
- toJson Convert the current array to JSON.
- toQuery Convert the array into a query string.
- toString Convert the current array to string recursively implodes an array with optional key inclusion.
- undot Expands a dot notation array into a full multi-dimensional array.
- unique Remove duplicate values from the current array.
- walk Apply the given function to the every element of the current array, discarding the results.
- where Filters the array items by a given condition.
- whereBetween Filters the array items by the given key is between the given values.
- whereContains Filters the array items by the given key is contains given value.
- whereEndsWith Filters the array items by the given key is ends with given value.
- whereEqual Filters the array items by the given key is equal given value.
- whereGreater Filters the array items by the given key is greater the given value.
- whereGreaterOrEqual Filters the array items by the given key is greater or equal the given value.
- whereIn Filters the array items by the given key value pair.
- whereLess Filters the array items by the given key is less the given value.
- whereLessOrEqual Filters the array items by the given key is less or equal the given value.
- whereNewer Filters the array items by the given key is newer given value.
- whereNotBetween Filters the array items by the given key is not between the given values.
- whereNotContains Filters the array items by the given key is not contains given value.
- whereNotEqual Filters the array items by the given key is not equal given value.
- whereNotIn Filters the array items by the given key value pair.
- whereNotRegexp Filters the array items by the given key is not matches to given regexp.
- whereOlder Filters the array items by the given key is older given value.
- whereRegexp Filters the array items by the given key is matches to given regexp.
- whereStartsWith Filters the array items by the given key is starts with given value.