<?php
// The linked list node
class node {
public $id; // node id
public $name; // The name of the node
public $next; // Under the 1 node
public function __construct($id, $name) {
$this->id = $id;
$this->name = $name;
$this->next = null;
}
}
// Singly linked lists
class singelLinkList {
private $header; // Chain header node
// A constructor
public function __construct($id = null, $name = null) {
$this->header = new node ( $id, $name, null );
}
// Gets the length of the list
public function getLinkLength() {
$i = 0;
$current = $this->header;
while ( $current->next != null ) {
$i ++;
$current = $current->next;
}
return $i;
}
// Add node data
public function addLink($node) {
$current = $this->header;
while ( $current->next != null ) {
if ($current->next->id > $node->id) {
break;
}
$current = $current->next;
}
$node->next = $current->next;
$current->next = $node;
}
// Delete the list node
public function delLink($id) {
$current = $this->header;
$flag = false;
while ( $current->next != null ) {
if ($current->next->id == $id) {
$flag = true;
break;
}
$current = $current->next;
}
if ($flag) {
$current->next = $current->next->next;
} else {
echo " Not found id=" . $id . " The node! <br>";
}
}
// Access list
public function getLinkList() {
$current = $this->header;
if ($current->next == null) {
echo (" The list is empty !");
return;
}
while ( $current->next != null ) {
echo 'id:' . $current->next->id . ' name:' . $current->next->name . "<br>";
if ($current->next->next == null) {
break;
}
$current = $current->next;
}
}
// Get the node name
public function getLinkNameById($id) {
$current = $this->header;
if ($current->next == null) {
echo " The list is empty !";
return;
}
while ( $current->next != null ) {
if ($current->id == $id) {
break;
}
$current = $current->next;
}
return $current->name;
}
// Update node name
public function updateLink($id, $name) {
$current = $this->header;
if ($current->next == null) {
echo " The list is empty !";
return;
}
while ( $current->next != null ) {
if ($current->id == $id) {
break;
}
$current = $current->next;
}
return $current->name = $name;
}
}
$lists = new singelLinkList ();
$lists->addLink ( new node ( 5, 'eeeeee' ) );
$lists->addLink ( new node ( 1, 'aaaaaa' ) );
$lists->addLink ( new node ( 6, 'ffffff' ) );
$lists->addLink ( new node ( 4, 'dddddd' ) );
$lists->addLink ( new node ( 3, 'cccccc' ) );
$lists->addLink ( new node ( 2, 'bbbbbb' ) );
$lists->getLinkList ();
echo "<br>----------- Remove nodes --------------<br>";
$lists->delLink ( 5 );
$lists->getLinkList ();
echo "<br>----------- Update node name --------------<br>";
$lists->updateLink ( 3, "222222" );
$lists->getLinkList ();
echo "<br>----------- Get the node name --------------<br>";
echo $lists->getLinkNameById ( 5 );
echo "<br>----------- Gets the length of the list --------------<br>";
echo $lists->getLinkLength ();
?>