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codesoftly1000
Smarty n00b
Joined: 18 Jul 2018
Posts: 1
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 Posted: Wed Jul 18, 2018 3:17 pm Post subject: Undefined Index error in displaying Nested While Loops |
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I have a nested while loop that fetches Mega Menus. The while loop returns me the proper array data that I exactly want. I am trying to reflect this in Smarty but I am getting error.
This is my PHP
| Code: | $cats = array();
$catSQL = $pdo->prepare("SELECT * FROM category");
$catSQL-> execute();
while($rowCat = $catSQL->fetch()) {
$cat = array();
$cat['id'] = $rowCat['cat_id'];
$cat['name'] = $rowCat['cat_name'];
$childCat = array();
$subCatSQL = $pdo->prepare("SELECT * FROM sub_category WHERE sc_cat = ".$rowCat['cat_id']);
$subCatSQL-> execute();
while($subCatResult = $subCatSQL->fetch()) {
$subCatID = $subCatResult['sc_id'];
$project = $subCatResult;
$childCats = array();
$childCatSQL = $pdo->prepare("SELECT * FROM child_category WHERE cc_subcat=".$subCatID);
$childCatSQL-> execute();
while($childCatResult = $childCatSQL->fetch()) {
$childCats[] = $childCatResult;
$project['ccname'] = $childCats;
}
$childCat[] = $project;
}
$cat['categories'] = $childCat;
$cats[] = $cat;
// echo "<pre>"; print_r($cat);
}
$smarty->assign('cats', $cats); |
This is my array data from `print_r($cat);`
| Code: | Array
(
[id] => 1
[name] => Computers
[categories] => Array
(
[0] => Array
(
[sc_id] => 1
[0] => 1
[sc_cat] => 1
[1] => 1
[sc_name] => Laptops
[2] => Laptops
[ccname] => Array
(
[0] => Array
(
[cc_id] => 1
[0] => 1
[cc_subcat] => 1
[1] => 1
[cc_name] => Hewlett-Packard
[2] => Hewlett-Packard
)
[1] => Array
(
[cc_id] => 2
[0] => 2
[cc_subcat] => 1
[1] => 1
[cc_name] => Dell
[2] => Dell
)
[2] => Array
(
[cc_id] => 3
[0] => 3
[cc_subcat] => 1
[1] => 1
[cc_name] => Lenovo
[2] => Lenovo
)
[3] => Array
(
[cc_id] => 4
[0] => 4
[cc_subcat] => 1
[1] => 1
[cc_name] => Acer
[2] => Acer
)
)
)
[1] => Array
(
[sc_id] => 2
[0] => 2
[sc_cat] => 1
[1] => 1
[sc_name] => Desktops
[2] => Desktops
[ccname] => Array
(
[0] => Array
(
[cc_id] => 5
[0] => 5
[cc_subcat] => 2
[1] => 2
[cc_name] => Dell
[2] => Dell
)
[1] => Array
(
[cc_id] => 6
[0] => 6
[cc_subcat] => 2
[1] => 2
[cc_name] => Lenovo
[2] => Lenovo
)
)
)
)
)
Array
(
[id] => 2
[name] => Components
[categories] => Array
(
[0] => Array
(
[sc_id] => 3
[0] => 3
[sc_cat] => 2
[1] => 2
[sc_name] => Monitors
[2] => Monitors
)
[1] => Array
(
[sc_id] => 4
[0] => 4
[sc_cat] => 2
[1] => 2
[sc_name] => Printers
[2] => Printers
)
[2] => Array
(
[sc_id] => 5
[0] => 5
[sc_cat] => 2
[1] => 2
[sc_name] => Scanners
[2] => Scanners
)
[3] => Array
(
[sc_id] => 6
[0] => 6
[sc_cat] => 2
[1] => 2
[sc_name] => Web Cameras
[2] => Web Cameras
)
)
) |
This is my Smarty Code
| Code: | {foreach from=$cats item=cat}
<p>{$cat.name}</p>
{foreach from=$cat.categories item=subcat}
<p>{$subcat.sc_name}</p>
{foreach from=$subcat.ccname item=childcat}
{$childcat.cc_name}
{/foreach}
{/foreach}
{/foreach}
|
This is the data with error that I am getting in my page.
| Code: | Computers
Laptops
Hewlett-Packard Dell Lenovo Acer
Desktops
Dell Lenovo
Components
Monitors
Notice: Undefined index: ccname in E:\xampp\htdocs\flexicart\tmp\87fa8c3a5ed8262adb884ae139069921fd39e8c8_0.file.layout.tpl.cache.php on line 64
Printers
Notice: Undefined index: ccname in E:\xampp\htdocs\flexicart\tmp\87fa8c3a5ed8262adb884ae139069921fd39e8c8_0.file.layout.tpl.cache.php on line 64
Scanners
Notice: Undefined index: ccname in E:\xampp\htdocs\flexicart\tmp\87fa8c3a5ed8262adb884ae139069921fd39e8c8_0.file.layout.tpl.cache.php on line 64
Web Cameras
Notice: Undefined index: ccname in E:\xampp\htdocs\flexicart\tmp\87fa8c3a5ed8262adb884ae139069921fd39e8c8_0.file.layout.tpl.cache.php on line 64
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Here as you can see that though I am getting all the data I need still this Undefined Index error seems to occur out of nowhere. I don't understand why this is happening. I got this reference solution from here https://www.smarty.net/forums/viewtopic.php?p=58031 (the last topic). Please help me. Stuck for long here. |
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AnrDaemon
Administrator
Joined: 03 Dec 2012
Posts: 1785
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| Posted: Thu Jul 19, 2018 1:40 pm Post subject: |
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Start by reading https://phpdelusions.net/pdo#why
You're using a precise tool, which is PDO, like a stoneage hammer, and write your queries in a way that will get you fired the day your colleagues see them. |
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