php create navigation menu from multidimensional array dynamically

问题:

I did research on this, and wasn't able to find an exact answer. Most of the questions/answers on here pertaining to this seem to be unfinished. If anyone knows of a finished solution similar to my question, please point me in that direction!

Here is my array:

Array ( ['home'] => Array     (         [0] => sub-home1         [1] => sub-home2     )  ['about'] => Array     (         [0] => sub-about         ['about2'] => Array             (                 [0] => sub-sub-about             )      )  ['staff'] => Array     (         [0] => sub-staff1         [1] => sub-staff2     )  ['contact'] => contact ) 

And here is what I would like to turn it into:

<ul>     <li><a href="">home<a/>         <ul>             <li><a href="">sub-home1</a></li>             <li><a href="">sub-home2</a></li>         </ul>     </li>     <li><a href="">about<a/>         <ul>             <li><a href="">sub-about</a></li>             <li><a href="">about2</a>                 <ul>                     <li><a href="">sub-sub-about<a/></li>                 </ul>             </li>         </ul>     </li>     <li><a href="">staff<a/>         <ul>             <li><a href="">sub-staff1</a></li>             <li><a href="">sub-staff2</a></li>         </ul>     </li>     <li><a href="">contact<a/></li> </ul> 

The array will be dynamically generated, but will have a limit of 3 levels ex: about->about2->sub-sub-about. I tried going off of this question: PHP/MySQL Navigation Menu but they didn't really seem to come to a conclusion? I am familiar with foreach's whiles and for loops but I just can't seem to wrap my head around this one.

EDIT: Enzino, your code works!

回答1:

Here is my solution:

<?php  function MakeMenu($items, $level = 0) {     $ret = "";     $indent = str_repeat(" ", $level * 2);     $ret .= sprintf("%s<ul>\n", $indent);     $indent = str_repeat(" ", ++$level * 2);     foreach ($items as $item => $subitems) {         if (!is_numeric($item)) {             $ret .= sprintf("%s<li><a href=''>%s</a>", $indent, $item);         }         if (is_array($subitems)) {             $ret .= "\n";             $ret .= MakeMenu($subitems, $level + 1);             $ret .= $indent;         } else if (strcmp($item, $subitems)){             $ret .= sprintf("%s<li><a href=''>%s</a>", $indent, $subitems);         }         $ret .= sprintf("</li>\n", $indent);     }     $indent = str_repeat(" ", --$level * 2);     $ret .= sprintf("%s</ul>\n", $indent);     return($ret); }  $menu = Array(             'home' => Array("sub-home1", "sub-home2"),             'about' => Array("sub-about", "about2" => Array("sub-sub-about")),             'staff' => Array("sub-staff1", "sub-staff2"),             'contact' => "contact"         );  print_r($menu);  echo MakeMenu($menu);  ?> 

回答2:

Calvin's solution worked for me. Here's the edited version. We can use more nested loops to get sub - sub menu items.

echo '<ul>'; foreach ($menu as $parent) {      echo '<li><a href="#">' . $parent . '</a>';      if (is_array($parent)) {         echo '<ul>';             foreach ($parent as $children) {                 echo '<li><a href="#">' . $children . '</a>';             }         echo '</ul>';     }      echo '</li&gt'; } echo '</ul>';

回答3:

I think you can use recursion? Here is some pseudocode, not very familiar with php.

function toNavMenu(array A){     for each element in A{         echo "<li><a href=\"\">" + element.name + "</a>"         if (element is an array){             echo "<ul>"             toNavMenu(element)             echo "</ul>"         }         echo "</li>"     } } 

回答4:

I would probably slightly adapt the array to be something like the following:

Array(     0 => Array(         'title' => 'Home',         'children' => Array()     ),     1 => Array(         'title' => 'Parent',         'children' => Array(             0 => Array(                 'title' => 'Sub 1',                 'children' => Array(),             ),             1 => Array(                 'title' => 'Sub 2',                 'children' => Array(                     0 => Array(                         'title' => 'Sub sub 2-1',                         'children' => Array(),                     ),                 ),             ),         )     ) )  

With a structure like this you could use recursion to build your menu HTML:

function buildMenu($menuArray) {     foreach ($menuArray as $node)     {         echo "<li><a href='#'/>" . $node['title'] . "</a>";         if ( ! empty($node['children'])) {             echo "<ul>";             buildMenu($node['children']);             echo "</ul>";         }         echo "</li>";     } } 

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