PHP - Echo $test With Class

OK, have no idea what's going on... I've done this a million times... why wont this output!??
I must have a major brain meltdown and dont know it yet!!!

Code: [Select]
<?php

// this echoes just fine:
echo $_POST['testfield'];


// but this wont echo:
echo 
if (isset($_POST['testfield']))
{
$_POST['testfield'] = $test;
}
echo $test;


/// or even this DOESNT echo either!:
$_POST['testfield'] = $test;
echo $test;

?>

Hi All,

I'm trying to echo the response from an SLA query, the query works and returns the data when I test it on an SQL application.. but when I run it on my webpage it won't echo the result.

Please help?

<?php   
$mysqli = mysqli_connect("removed", "removed", "removed", "removed");  
$sql = "SELECT posts.message FROM posts INNER JOIN threads ON posts.pid=threads.firstpost WHERE threads.firstpost='1'";  
$result = mysqli_query($mysqli, $sql);   
echo {$result['message']}; 
?>

I have mysqli object in Database class base:

[color=]database class:[/color]

class Database {
  private $dbLink = null;
  
  public function __construct() {
    if (is_null($this->dbLink)) {
      // load db information  to connect
      $init_array = parse_ini_file("../init.ini.inc", true);
      $this->dbLink = new mysqli($init_array['database']['host'],
                           $init_array['database']['usr'],
                           $init_array['database']['pwd'],
                           $init_array['database']['db']);
  
      if (mysqli_connect_errno()) {
        $this->dbLink = null;
      }
    }
  }

  public function __destruct() {
    $this->dbLink->close();
  }
}


Class derived is Articles where I use object dBLink in base (or parent) class and I can't access to mysqli methods (dbLink member of base class):

Articles class:

require_once ('./includes/db.inc');

class Articles extends Database{
  private $id,
              ....
              ....
             $visible = null;
  
  public function __construct() {
    // Set date as 2009-07-08 07:35:00
    $this->lastUpdDate = date('Y-m-d H:i:s');
    $this->creationDate = date('Y-m-d H:i:s');
  }
  
  // Setter
  ....
  ....

  // Getter
  ....
  ....

  public function getArticlesByPosition($numArticles) {
    if ($result = $this->dbLink->query('SELECT * FROM articles ORDER BY position LIMIT '.$numArticles)) {
      $i = 0;
      while ($ret = $result->fetch_array(MYSQLI_ASSOC)) {
        $arts[$i] = $ret;
      }
      $result->close();
      return $arts;
    }
  }
}


In my front page php I use article class:


include_once('./includes/articles.inc');
$articlesObj = new articles();
$articles = $articlesObj->getArticlesByPosition(1);
var_dump($articles);


[color=]Error that go out is follow[/color]

Notice: Undefined property: Articles::$dbLink in articles.inc  on line 89

Fatal error: Call to a member function query() on a non-object in articles.inc on line 89

If I remove constructor on derived class Articles result don't change 
Please help me

Ok. I know you can pass the object of a class as an argument. Example:


class A {
    function test() {
        echo "This is TEST from class A";
    }
}


class B {
    function __construct( $obj ) {
        $this->a = $obj;
    }

    function test() {
       $this->a->test();
    }

}


Then you could do:

$a = new A();
$b = new B($a);


Ok so that's one way i know of.

I also thought that you could make a method static, and do this: (assuming class A's test is 'static')

class B {
    function test() {
       A::test(); 
   }
}


But that is not working.


I'd like to know all possible ways of accomplishing this. Any hints are appreciated. thanks

Hi

Can you call Class A's methods or properties from Class B's methods?

Thanks.

If a class has a constructor but also has a static method, if I call the static method does the constructor run so that I can use an output from the constructor in my static method?

--Kenoli

I have an existing instance of my class Database, now I want to call that instance in my Session class, how would I go about doing this?

Hi,

I need to be able to call a class based on variables.  E.G.

I would normally do:
Code: [Select]
$action = new pattern1()
but i would like to be able to do it dynamicaly:
Code: [Select]
$patNum = 1;
$action = new pattern.$patNum.()
Im wondering if that's possible?  If so what would the correct syntax be?

Many Thanks.

I have a log system that allows 10 logs on each side(Left and right). I am trying to make it so that the left side has the 10 most recent logs, then the right as the next 10. Any ideas?

So I need to echo a row from my database with php, but where i need to echo is already inside an echo. This is my part of my code:


$con = mysql_connect("$host","$username","$password");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("main", $con);

$result = mysql_query("SELECT * FROM Vendor");

while($row = mysql_fetch_array($result))
  {
//I need to echo right here  .................. but I get a blank page when I try this. Please Help.
  echo '<option value=$row['vendor_id']>'; echo $row['vendor_id']; echo '</option>';
  }

mysql_close($con);

Result: A Blank page.
Thanks in advance!

Hi so i've been learning php for 3 mouth now by reading php 6 Bible and watching lynda and so on... i was looking for a job in few past weeks and i found out i don't have that kind of self confidence to go for it ! you know when they say : PHP Project Manager , it scar's me... the thing is , i know all about basic to medium php , array...MySQL....all those essentials but i don't know what do they want from a php web developer . so i began to search for intern job somewhere and i told myself i should bust my ass 24/7 for few mouth and after that i ll be real php guy and it seems like there is no place to reach not  php but almost all programming languages a year ago i was searching for the same thing but in networking section and there was 100's of intern ship jobs but in programming there is none ! so i want some one to give me (us) simple to pro real life projects . what do they want php junior or senior developer's for ? what do they do? what is the most common needs ? what is the most essential things to know? what is a hired php developer should do in the office? some people doesn't need you in the office and want you to work from home , they give you project's , what's that? is there any source in the web to offer what is need ? i know its too much , but this was my last option , so if anyone can help i would practically owe him/her my whole future salaries...

Hello All happy new year

I am trying to make a php page that detects if something is plugged in to the ethernet port.
This would be complex if not impossible. I however managed to do something similar the device
that will be plugged in has a static address 192.168.1.1. so I created a ping that says if the device is up or
down.

function ping($host, $port, $timeout)
{
  $fP = fSockOpen($host, $port, $errno, $errstr, $timeout);
  $status;
 
  if ($fP)
  { echo "Device is ready to accept data";}
  else
  { echo "Device Down - Retrying connection"; }
} 

What I would like to do is have a script that is constantly checking is the device is plugged or when it is not
(so sort of a loop or auto detect). The idea is to have an image with the device up or down.

Regards
and a happy new year
JG

I am trying to select text to display on condition of the current date.
I've set a Unix timestamp for the current date:
<?php
$todays_date = date("Y-m-d"); 
$today = strtotime($todays_date); 
?>
Next I test for the first condition. I want the text to appear for 2 weeks then terminate:
<?php
$exp_date = "2011-05-09"; 
$expiration_date = strtotime($exp_date); 
$start_date = strtotime("-14 days", $expiration_date);
if ($start_date < $today && $expiration_date > $today) { 
echo "<h2>Special Event #1</h2>";
} elseif {

At this point, I want to set the exp_date for the next event and test again, but I don't know how to do it. The techniques I've tried appear to evaluate as false and display the default text which follows the final "else":
} else {
echo "<h2>Default Text</h2>";
}
?>

I got this script for change language and don't know is it working. In this array are supported language s for this site, so if you come from some of this 7 country should open your language, for others english version. Don't know any other way to test it!
http://www.lacman.hr/index.php
  Code: [Select]
$jezici = array("hr", "en", "de", "it", "fr", "cz", "pl");

write the algorithm to draw a sphere, the function should have parameters
   1. diameter (how many line)
   2. character (use which character to draw)
   
   eg, draw_sphere(10, '8') will produce:
   
                    88888
                 8888888888888   
               8888888888888888888
              888888888888888888888
                      88888888888888888888888
                88888888888888888888888
              888888888888888888888
               8888888888888888888
                 8888888888888   
                    88888
            
   the above is a sphere of 10 lines, which is drawn using the character "8"


i cant figure out how to do it, thanks in advanved!