PHP - Not Able To Access My Id Property

Hello, I'm currently in the process of trying to learn php.  I've been working on an issue with something I am trying to code from a book I purchased "PHP and MySQL Web Development 5th Ed." by Luke Welling and Laura  Thomson.

So far the book has been great, but I'm trying to figure out using MySQL and php.  When I try to run this particular script for a query for a book store, I get the error: Notice: Trying to get property of non-object in C:\php-book\ch11\results.php on line 37.

This is the code:

Code: [Select]
$query = "select * from books where ".$searchtype."like '%".$searchterm."%'";
$result = $db->query($query);

$num_results = $result->num_rows;

echo "<p>Number of books found: ".$num_results."</p>";

for($i=0; $i<$num_results; $i++) {
$row = $result->fetch_assoc();
echo "<p><strong>".($i+1).". Title: ";
echo htmlspecialchars(stripslashes($row['title']));
echo "</strong><br />Author: ";
echo stripslashes($row['author']);
echo "<br /> ISBN: ";
echo stripslashes($row['isbn']);
echo "<br />Price: ";
echo stripslashes($row['price']);
echo "</p>";
}

$result->free();
$db->close();
Line 37 is specifically:
$num_results = $result->num_rows;

I've been bashing my head for a couple of hours here, thank you in advance to whoever can offer any help.

Hey Guys. I have a shopping cart script that loops through the shopping cart session  array and assigns values to the property of a class. For some weird reason the subtotal property only works when I use the self keyword. If I use the $this-> instance variable  the sub total does not get assigned the subtoal price. Its just NULL.   Does anyone have any suggestions as to why it may not be working.   Below is a quick copy and paste of my code. Please be aware that some there may be some syntax mistakes as a result to copying and pasting part of my code that is relevant to this issue. Thanks!

class CoreCartFunctions {

protected static $subtotal;
protected $menu_item_price = NULL;

public function GetMenuItem() {

//self:items is the cart session array that is initilized in a construct method
//Assign the values for each cart array
      foreach (self::$items as $menu_item_id_session) {


$this->menu_item_price = getItems($this->menu_item_id,"menu_item_price")*$this->item_qty;

self::$subtotal += $this->menu_item_price; 
//Does not work with the following ---> $this->subtotal += $this->menu_item_price; 

}




}

Hi Guys

Trying to get xml elements to display in a html table using the following code
Code: [Select]
<?php
session_start();
include_once('includes/connect_inc.php');
$file="https://www.cdlvis.com/lookup/getxml?username=username&mode=test&key=password&vrm=".$_POST['veh_reg']."";
$dom=new DOMdocument();
$dom->load($file);
$xml=simplexml_import_dom($dom);
?>

and

Code: [Select]
<form name="vehicle_details" method="post" action="add_vehicle.php">
<table>
<tr>
<td>Registration Number:</td><td><input name="reg_num" type="text" value="<?php echo $xml->result[0]->vrm;?>" readonly="true" /></td></tr>
<tr>
<td>Make:</td><td><input name="make" type="text" value="<?php echo $xml->result[0]->make;?>" readonly="true" /></td></tr>
<tr>
<td>Model:</td><td><input name="model" type="text" value="<?php echo $xml->result[0]->model;?>" readonly="true" /></td></tr>
<tr>
<td>Date of Manufactu </td><td><input name="date_man" type="text" value="<?php echo $xml->result[0]->date_manufactured;?>" readonly="true" /></td></tr>
<tr>
<td>Date of First Registration:</td><td><input name="date_reg" type="text" value="<?php echo $xml->result[0]->first_registered;?>" readonly="true" /></td></tr>
<tr>
<td>Colour:</td><td><input name="colour" type="text" value="<?php echo $xml->result[0]->colour;?>" readonly="true" /></td></tr>
<tr>
<td>Body Style:</td><td><input name="body" type="text" value="<?php echo $xml->result[0]->body;?>" readonly="true" /></td></tr>
<tr>
<td>Number of Doors:</td><td><input name="doors" type="text" value="<?php echo $xml->result[0]->doors;?>" readonly="true" /></td></tr>
<tr>
<td>Engine Size:</td><td><input name="engine_size" type="text" value="<?php echo $xml->result[0]->engine_size;?>" readonly="true" /></td></tr>
<tr>
<td>Fuel Type:</td><td><input name="fuel_type" type="text" value="<?php echo $xml->result[0]->fuel;?>" readonly="true" /></td></tr>
<tr>
<td>Gearbox Type:</td><td><input name="gearbox" type="text" value="<?php echo $xml->result[0]->gearbox_type;?>" readonly="true" /></td></tr>
<tr>
<td>Previous Keepers:</td><td><input name="keepers" type="text" value="<?php echo $xml->result[0]->previous_keepers;?>" readonly="true" /></td></tr>
<tr>
<td>BHP:</td><td><input name="bhp" type="text" value="<?php echo $xml->result[0]->smmt_power_bhp;?>" readonly="true" /></td></tr>
<tr>
<td>Emissions:</td><td><input name="co2" type="text" value="<?php echo $xml->result[0]->smmt_co2;?>" readonly="true" /></td></tr>
<tr>
<td><input name="try_again" type="button" value="Try Again" /></td><td><input name="submit" type="submit" value="Next Stage" /></td></tr>
</table>
</form>

What have I done wrong?

I am trying to run a count query and faced with the error: Notice: Trying to get property of non-object in

Not sure how to resolve this error in these lines:

 

if($result->num_rows > 0){
while($row = $result->fetch_rows()){

Code:

<?php

$sql = "SELECT 
    Form_Group
    COUNT(Presence LIKE '/') AS Present,
    COUNT(Presence LIKE 'N') AS Absent,
FROM 'attendance'";
$result = $conn->query($sql);

?>

<?php
//Fetch Data form database
if($result->num_rows > 0){
while($row = $result->fetch_rows()){
?>


<tr>
<td><?php echo $row['Form_Group']; ?></td>
<td><?php echo $row['Present']; ?></td>
<td><?php echo $row['Absent']; ?></td>
</tr>

<?php
}
}
else
{
?>
<tr>
<th colspan="6">There's No data found!!!</th>
</tr>
<?php
}
?>

 

Keep getting this error from line 19 (Notice: Trying to get property of non-object in /clientdata/zeus-dynamic-1/s/o/blahblah/www/tyson/onion.php on line 18)... have no idea how to get rid of it. Do I have to use isset? If so.. where??? (obviously I've replaced site address with website)

Code: [Select]


    include('simple_html_dom.php');
    $story = array();

    getArticles('website');

    function getArticles($page) {
    global $story, $desc, $read;
   
    $html = new simple_html_dom();
    $html->load_file($page);
   
    $items = $html->find('div[id=story_content]'); 
   
    foreach($items as $post) {
            $story[] = array($post->children(0)->plaintext, $post->children(2)->next_sibling()->innertext, $post->children(4)->innertext);

                          }
}


    $i = 0;
    foreach($story as $item) {
        $syurl = str_replace('href="', 'href="http://website', $item[2]);
        echo '<p class="storytitle">' . $item[0] . '</p>';
        echo '<p class="storyexcerpt">' . $item[1] . '</p>';
        echo '<p class="storyread">' . $syurl . '</p>';
        if (++$i == 3) break;
    }


Any ideas?

This line is causing the issue: $story[] = array($post->children(0)->plaintext, $post->children(2)->next_sibling()->innertext, $post->children(4)->innertext);

Likewise, it does post the 3 storys below the 2 error lines...?

Hey Guys. I am trying to assign a property through a method that is called in a swtich method.    After the property gets "assigned" I do a var_dump on the property and it returns NULL?   I am not sure why it returns NULL.... I would really appreciate any help...

class Tea {
 
 
 public $current_tea;
//Current tea does not get assigned when using the AssignTea($TeaArg) function
 
 private $upcoming_tea  = "Blacktea";
 
 public function SelectTea() { 
  $TeaType = "Black";
 switch ($TeaType) {
    case "Black":
$this->AssignTea($this->upcoming_tea);
    break;


}// End of Swtich
 
 
}// End of function SelectTea()


private function AssignTea($TeaArg){
 
 $this->current_tea = $TeaArg;
 
}



}
$tea = new Tea();
var_dump($tea->current_tea);

Edited by eldan88, 20 May 2014 - 10:07 AM.

hey guys i havent done any cloneing before but what im trying to do is clone $this->_view property in my Action class and pass it to my News_Controller class so i can call the View class by a varaible and not a property....can anyone help me and give me some advise on how i should do this...i tried below but i cant get it to work...thanks alot

news controller class
Code: [Select]
<?php

class News_Controller extends Action
{
public function articles()
{
$view->title = "hello";
}
}
?>
action class
Code: [Select]
<?php

class Action
{
protected $_request;
protected $_response;

public $_view;

public function __construct(Request $request, Response $response)
{
$this->set_request($request)->set_view();
$view = $this->clone_view();
$view->title = "hello";
$this->_response = $response;
}

protected function set_request(Request $request)
{
$this->_request = $request;
return $this;
}

protected function set_view()
{
$this->_view = new View;
return $this;
}

protected function get_request()
{
return $this->_request;
}

    public function clone_view()
    {
        $view = clone $this->_view;
        return $view;
    }

public function dispatch($method, $parameters)
{
if ($this->get_request()->is_dispatched())
{
if(method_exists($this, $method))
{
call_user_func_array(array($this, $method), $parameters);
}
else 
{

}
} 
}
}
?>

Hi,

I was wondering if someone can help me, I keep getting these errors.

Notice: Undefined property: stdClass::$vOptionType in /default/commonFunctions.php on line 267

That is the line from the file.

if($rsOptions[$j]->vOptionType=='colour_fromcsv' || $rsOptions[$j]->vOptionType=='size_fromcsv')

I was wondering if someone could tell me what it means and possible point me in the right direction on how to fix the issue.
Thanks,
Jordan

For example:

class People{
    var $them = array();
    
    function groupPeople(){
      foreach($this->them as $him){
           echo $him.", ";
      }
   }
}

$people  = new People;
$people->them = array('Harry','Todd');

$people->them = array('Tom','Jerry');
$people->groupPeople(); // result: Tom, Jerry,


I think this code is working. However, I need to merge those array above, array('Harry','Todd') and array('Tom','Jerry') So I can get array('Harry','Todd','Tom','Jerry') and a list of names as a result. Maybe I should use array_merge, but how? A little help would be appreciated.

Thank you in advanced,
ayok

We have a complex, json object which is multiple levels deep. We need to search for a given property/key in the entire object (not just first occurrence, but all), and if we find the property, return where in the object each property exists, so we can modify the properties value. Figure it needs to be recursive.

So I'm getting a "Notice: Trying to get property of non-object in" error when I'm trying to pull data from a xml.  I have a complete xml that has all of the potential node that it could ever have and it loads up fine -no errors, but when I load a different xml that doesn't have all of the possible nodes it returns this error several times here is a sample of my code:

$source = 'TestFile.xml';

$xml = new SimpleXMLElement($source,null,true);

$result = mysql_query("SELECT * FROM tblvalues") or die(mysql_error());

//Return the table row by row
while($row = mysql_fetch_array($result))
  {
    $curblk = substr($row['fldelement'],0,3);

    switch ($row['fldelement']){
        case "E06_04":
        case "E06_05":
        case "E06_07":
        case "E06_08":
            $cursub = $curblk."_04_0";
            $xmlVal = $xml->Header->Record->$curblk->$cursub->$row['fldelement']; //grab value from xml
            break;
        ...
        ...
        ... // the cases go on for a while...
        ...
        case "E07_05":
        case "E07_06":
        case "E07_07":
        case "E07_08":
            $cursub = $curblk."_03_0";
            $cursub2 = $curblk."_05_0";
            $xmlVal = $xml->Header->Record->$curblk->$cursub->$cursub2->$row['fldelement']; //this is the line that the error points to
            break;
        ...
        ...
        ...


And here is the sample of the xml that returns the error:
Code: [Select]
<E07>
    <E07_01>-20</E07_01>
    <E07_02>0</E07_02>
    <E07_15>-25</E07_15>
    <E07_16>-25</E07_16>
    <E07_17>-25</E07_17>
    <E07_18_0>
      <E07_18_01>
        <E07_18>-20</E07_18>
        <E07_19>-20</E07_19>
        <E07_20>-20</E07_20>
      </E07_18_01>
      ....
      ....
      ....
The obvious problem (to me) is that my code is trying to return a value from a nonexistent xml node, for example:

$xmlVal = $xml->Header->Record->$curblk->$cursub->$cursub2->$row['fldelement'];

is looking for:

$xmlVal = $xml->Header->Record->E07->E07_03_0->E07_05_0->E07_05

Ok, I get that, so how do I rewrite this so it's not blowing up on something so simple?

Quick notes:
-This same code works for a more complete xml
-Rewriting the xmls is not an option as I have no control over those

Edit: Almost forgot, thanks!

I want to save class property values and want to write these in the database after being called from another function.
Code: [Select]
class model{
public $dbh;
public $user_arr=array('username','password','email','location','interest','homepage');
 public function insert_data()
 {
 
 $sql = "INSERT INTO account VALUES ('" .$user_info['username']."','".$user_info['password']
      ."','".$user_info['email']."', 'user','".$user_info['location']."','".$user_info['interests']
      ."','".$user_info['homepage']."')";
      //if(isset($data))
      echo $sql;   
 }
public function data_approoved($user){
 //$user_info = new array();
 $user_arr['username'] = $user['username'];
 $user_arr['password'] = $user['password'];
 $user_arr['email'] = $user['email'];
 $user_arr['location'] = $user['location'];
 $user_info['interests'] = $user['interests'];
 $user_info['homepage'] = $user['homepage'];
 Model::insert_data();
 }
}
}//class ended
The approoved_data function is supposed to set the values of $user_info array which should be later on stored in database.
Please somebody help me.

I am using the following code   foreach ($fbdata->data as $post )
{
$posts .= '<li>';
$posts .= '<p>' . $post->message . '</p>';
$posts .= date('d-M-y', strtotime($post->created_time));
$posts .= '</li>';
}   and if the message propeerty doesn't exist I get the message above.   Any ideas on the best way to fix this?

Hello everyone,