Read a long time data structure but not how to use, on the Internet to see the data on the structure of PHP, learn a bit, and share with you. Last time I shared a list, this time to add a two-way list. Brief no cut &NBSP ; &NB Sp &NB Sp Copy code <?php &NB Sp Class Hero { public $pre =null public $no; public $name; public $next =null; Public function __construct ($no = ", $name = ') &NBSp { $this->no= $no &NBS P $this->name= $name; &N Bsp Static public Function Addhero ($head, $hero) { $cur = $head; $isExist =false; /Determine if the current list is empty &N Bsp if ($cur->next==null) { &NBSP ; $cur->next= $hero; $hero->pre= $cur; &NBsp else { &NB Sp //If not an empty node, schedule name to add //Find added location while ($cur->next!=null) &NBS P { if ($cur- >next->no > $hero->no) {& nbsp break; & nbsp &NBSp Else if ($cur->next->no = $hero->no) { $isExist =true; echo "<br> cannot add the same edit Number "; & nbsp $cur = $cur->next; & nbsp if (! $isExist) { & nbsp if ($cur->next!=null) { $hero->next= $cur ; next; & nbsp $hero->pre= $cur; if ($cur->next!=null) { & nbsp $hero->next->pre= $hero; & nbsp $cur->next= $hero; &NB Sp } &NBSP; } //traversal static public function Showhero ($ Head) { $cur = $head; &nbs P while ($cur->next!=null) &NBS P { echo "<br> No.:" $cur->next->no. " Name: ". $cur->next->name; $cur = $cur->next; } static public function Delhero ($head, $herono) &NBSP { $cur = $head; &NB Sp $isFind =false; while ($cur!=null) { if ($cur->no== $herono) &NB Sp { & nbsp $isFind =true; break; & nbsp //continue to find $cur = $cur->next; IF($isFind) { &NBSP ; if ($cur->next!=null) { &NBSP ; $cur->next_pre= $cur->pre; & nbsp $cur->pre->next= $cur->next; Else &NB Sp { E Cho "<br> did not find the target"; & nbsp } &NBS P $head = new Hero (); $hero 1 = new Hero (1, ' 1111 '); $hero 3 = new Hero (3, ' 3333 '); $hero 2 = new Hero (2, ' 2222 '); Hero::addhero ($head, $hero 1); Hero::addhero ($head, $hero 3); Hero::addhero ($head, $hero 2); Hero::showhero ($head); Hero::d Elhero ($head, 2); Hero::showhero ($head);?>
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