Standard PHP Library (SPL) the collection of standard data structures. The SPL data structure grouped the contents according to their implementation.
Example: Below programs illustrate the SplDoublyLinkedList::offsetGet() function in PHP:
PHP
<?php // Declare an empty SplDoublyLinkedList $list = new \SplDoublyLinkedList; // Use SplDoublyLinkedList::add() function to // add elements to the SplDoublyLinkedList $list->add(0, 30); $list->add(1, 20); $list->add(2, 30); $list->add(3, "Geeks"); $list->add(4, 'G'); $list->rewind(); // Use SplDoublyLinkedList::offsetGet() function // to check index exist or not var_dump($list->offsetGet(2)); var_dump($list->offsetGet(3)); ?> |
Output:
int(30) string(5) "Geeks"
Complete List of PHP SPL SplDoublyLinkedList Functions:
|
Functions |
Description |
Example |
|---|---|---|
| add() | Add a new value at the given index. | |
| bottom() | Peek the value of the node from the beginning of the doubly linked list. | |
| count() | Count the number of elements present in a doubly linked list. | |
| current() | Return the current element of the array. | |
| isEmpty() | Check whether the doubly linked list is empty or not. | |
| key() | Return the index of the current node. | |
| next() | Move the index into next index. | |
| offsetExists() | Check whether the given index exists or not. | |
| offsetGet() | Returns the value at the given index. | |
| offsetSet() | Set the value at the given index. | |
| offsetUnset() | That is used to unset the value at the given index. | |
| pop() | pop the node from the end of the doubly linked list. | |
| prev() | Move to the previous entry. | |
| push() | Push an element at the end of the doubly linked list. | |
| rewind() | Rewind the iterator back to the start or beginning. | |
| shift() | Shift the node from the beginning of the doubly linked list. | |
| top() | Return the value of the last (top) node in a doubly-linked list. | |
| unshift() | Add the element at the beginning of a doubly linked list. |
Complete List of PHP SPL SplFixedArray Functions
|
Functions |
Description |
Example |
|---|---|---|
| count() | Return the size of the array. | |
| current() | Get the current entry of the array. | |
| getSize() | Get the size of the array. | |
| key() | Get the key of the current index of the array. | |
| next() | Move the array element to the next entry of the array. | |
| offsetExists() | Check provided index exist or not in an array. | |
| offsetGet() | Get the offset of the specified index in an array. | |
| offsetUnset() | Unset the value of the requested index. | |
| rewind() | Rewind the array iterator to the start position. | |
| setSize() | Set the size of the array. | |
| toArray() | Get a PHP array from the fixed array. | |
| valid() | Check the array can contain more elements or not. |
Complete List of PHP SPL SplObjectStorage Functions
|
Functions |
Description |
Example |
|---|---|---|
| addAll() | Add elements from another storage. | |
| attach() | Add objects into the SplObjectStorage. | |
| contains() | Check whether the storage object contains a specified object or not. | |
| count() | Count the number of objects in storage. | |
| current() | Get the current entry of storage. | |
| detach() | Remove objects from the storage. | |
| getinfo() | Get the data associated with the object by the current | |
| key() | Get the index of the currently pointing iterator. | |
| next() | Move to the next entry of storage. | |
| offsetExists() | Check the object exists in storage or not. | |
| offsetGet() | Get the data associated with the object. | |
| offsetSet() | Set the object of storage. | |
| offsetUnset() | Set the object from the storage. | |
| removeAll() | Remove all objects contained in another storage from the current storage. | |
| removeAllExcept() | Remove all objects from storage except for those contains in another storage. | |
| rewind() | Rewind the iterator to the first storage element. | |
| serialize() | Serialize the result of the storage | |
| setInfo() | Set the data associated with the current iterator entry. | |
| unserialize() | Unserialize the storage from its serialize string | |
| valid() | Check the current storage entry is valid or not. |
Complete List of PHP SPL SplQueue Functions:
Functions |
Description |
Example |
|---|---|---|
| __construct() | Construct a queue that is implemented using a doubly-linked list. | |
| dequeue() | Dequeue the node from the queue. | |
| enqueue() | Add the element to the queue. |
