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PORecursive function causing webpage to go completely blank
 

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  1. PORecursive function causing webpage to go completely blank
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    <p>I'm trying to print a menu with a recursive function. I used examples of code from these questions:</p> <p><a href="https://stackoverflow.com/questions/10782810/echo-menu-tree-with-recursive-function">Echo menu tree with recursive function</a></p> <p><a href="https://stackoverflow.com/questions/8503151/create-an-multidimensional-array-from-a-database-table">Create an multidimensional array from a database table</a> </p> <p>The code seems right to me and is syntactically correct, but I get a blank page as a result. There are no errors, but the HTML following this php isn't showing up either. Does anyone have any thoughts? </p> <pre><code>$connect = mysqli_connect($db_host,$db_user,$db_password,$db_database) or die ("Couldn't connect to server: ".mysqli_error()); $query = "SELECT * FROM categories"; $result = mysqli_query($connect,$query) or die ("Couldn't execute query: ".mysqli_error()); function menuPrint($categories, $parent = 'root', $level = 0) { $menuList = '&lt;ul&gt;'; foreach($categories as $index =&gt; $category) { if($category['Parent'] == $parent) { $menuList .= '&lt;li id="'.$category['ID'].'" class="tier'.$level.'"&gt;'.$category['Name']; $check = $this-&gt;menuPrint($categories, $category['ID'], $level+1); if($check != '&lt;ul&gt;&lt;/ul&gt;') $menuList .= $check; $menuList .= '&lt;/li&gt;'; } } return $menuList . '&lt;/ul&gt;'; } $catgories = array(); while ($row = mysqli_fetch_assoc($result)) { $categories[] = array( 'ID' =&gt; $row['categoryId'], 'Name' =&gt; $row['categoryName'], 'Parent' =&gt; $row['parentCategory'], 'Disabled' =&gt; $row['disabled'] ); } $menu = $this-&gt;menuPrint($categories); echo $menu; mysqli_close($connect); </code></pre>
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    1. USCommunity
    1. USLeann
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    1. CODo you know where the problem is localized to? Does the script complete it's execution with $menu being blank? What happens if you simply remove the recursive call to `menuPrint()`, does it work then? Also, you call the method: `$this->menuPrint(...)` - is this in an object? If so, then what is the code outside of the function in? if not, why do you use `$this`?
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      1. PORecursive function causing webpage to go completely blank
      1. USjakerella
    2. COCan you post `var_dump($categories)`? Also, you misspelled the variable `$catgories` in one place, is that mistake in the original code?
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      1. PORecursive function causing webpage to go completely blank
      1. USBarmar
    3. COJakerella - while trying to gather the answers to all your questions, I solved the issue! The `$this->` was causing the problem. I originally modified a bit of code from one of the articles that I posted above, but didn't realize I had removed the method that was created. No wonder the code was blowing up. There was no method to call. I feel dumb. But I'm really glad that your questions led to the answer. Thank you! Is there a way to give you credit for that?
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      1. PORecursive function causing webpage to go completely blank
      1. USLeann
 

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