PHP - Using Call_user_func_array Inside Class Method

Hi

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

Thanks.

I have two classes:

## Admin.php

<?php
class Admin
{
public function __construct()
{
include("Config.php");
}

/**
* deletes a client
* @returns true or false
*/
function deleteClient($id)
{
return mysql_query("DELETE FROM usernames WHERE id = '$id'");
}
}
?>


## Projects.php

<?php
class Projects
{
public function __construct()
{
include("Config.php");
$this->admin = $admin;
$this->dataFolder = $dataFolder;
}

/**
* Deletes a project
* @returns true or false
*/
function deleteProject($id)
{
$root  = $_SERVER['DOCUMENT_ROOT'];
$theDir  = $root . $this->dataFolder;
$sql  = mysql_query("SELECT * FROM projectData WHERE proj_id = '$id'");
while ($row = mysql_fetch_array($sql))
{
$mainFile = $row['path'];
$thumb = $row['thumbnail'];
if ($thumb != 'null')
{
unlink($theDir . "/" . substr($thumb,13));
}
unlink($theDir . "/" . substr($mainFile,13));
}
$delete = mysql_query("DELETE FROM projectData WHERE proj_id = '$id'");
$getDir = mysql_query("SELECT proj_path FROM projects WHERE id = '$id'");
$res = mysql_fetch_array($getDir);
rmdir($theDir . "/" . $res['proj_path']);
return mysql_query("DELETE FROM projects WHERE id = '$id'");
}
}
?>


How can I call deleteProject() from within Admin.php?

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?

I found class on the net, and i am having a bit of a problem to understand how does update method works. Here is the code:
Code: [Select]
public function update() {
  global $database;
// Don't forget your SQL syntax and good habits:
// - UPDATE table SET key='value', key='value' WHERE condition
// - single-quotes around all values
// - escape all values to prevent SQL injection
$attributes = $this->sanitized_attributes();
$attribute_pairs = array();
foreach($attributes as $key => $value) {
  $attribute_pairs[] = "{$key}='{$value}'";
}
$sql = "UPDATE ".self::$table_name." SET ";
$sql .= join(", ", $attribute_pairs);
$sql .= " WHERE id=". $database->escape_value($this->id);
  $database->query($sql);
  return ($database->affected_rows() == 1) ? true : false;
}

I have form like this to deal with update:
Code: [Select]
<form action="index.php?page=languages" enctype="multipart/form-data" method="POST">
    <?php foreach($language as $lang){ ?>
    <input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size; ?>" />
    <label>Jezik</label><input type="text" size="50" name="language" value="<?php  echo $lang->lang; ?>" /><br>
    <input type="hidden" name="id_lang" value="<?php echo $lang->id_lang; ?>"  />
<label>Slika</label><input type="file" name="image"><?php 
echo "<img src=\"../images/";
echo $lang->image;
echo "\">";
?> <br>
    <label>Pozicija</label><input type="text" name="pozicija" value="<?php echo $lang->pozicija; ?>" size="2" /></p> <br>
<input type="submit" name="submit_update" value="Unesi">
    <?php } ?> 
    </form>
and code to start the function:
Code: [Select]
if(isset($_POST['submit_update'])) {
$language = new Jezik();
$language->update();
}
What next???

Hi
I have a problem with the following:
Code: [Select]
<?php
class ClassA {
  public $propertyClassName = "ClassB";

  public function methodClassName() {
    return "ClassB";
  }
}

class ClassB {
public function bmethod() {
echo "great!";
}
}

//works
$a = new ClassA();
$b = new $a->propertyClassName();
$b->bmethod();

//doesn't work
$a = new ClassA();
$b = new $a->methodClassName();
$b->bmethod();
?>
Of course I could do
Code: [Select]
<?php
$a = new ClassA();
$className = $a->methodClassName();
$b = new $className;
$b->bmethod();
?>but isn't there a way to do this without saving the method's return to a variable?
Thanks in advance
flolam

Using this locally works fine:


$html = $name::add_content($name, $html);


but i get the double colon error whe using it live.
$name is a name of a valid class.

What could throw this error when it works locally?

Hi

I have created a Database class that uses the singleton method.

I have a query method within this class so i would call this to return an array of results.

What i need to know is what would be the best way to use this returned array

Database Class:
Code: [Select]
<?php

class Database
{
private static $dbInstance;
private $hostname;
private $username;
private $password;
private $database;

private function __construct()
{
$this->hostname = 'localhost';
$this->username = 'user';
$this->password = 'pass';
$this->database = 'test';

mysql_connect($this->hostname, $this->username, $this->password);
mysql_select_db($this->database);
}

public static function getDBInstance()
{
if (!self::$dbInstance) 
     { 
         self::$dbInstance = new Database(); 
      } 

      return self::$dbInstance; 
}


public function query($q)
{
return mysql_query($q);
}


}

?>

Person Class:
Code: [Select]
<?php
require_once('Database.php');

class person
{
public function getName($id)
{
$con = Database::getDBInstance();
$query = $con->query("select name from data where id = ".$id);
$result = mysql_fetch_assoc($query);
echo $result['name'];

}


}

?>

Index page:
Code: [Select]
<?php

require_once('person.php');

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body>

<?php

$person = new person();
$person->getName(1);
echo "<br />";
$person->getName(2);


?>

</body>
</html>

Can I not pass references into class properities from outside the object? 

class db_manipulation { 

private $connection = NULL;

function __construct(&$database_connection) {
$this->connection = $database_connection;
if (!$this->connection) die('couldnt connection to database');
}

function __destruct() {
mysqli_close($this->connection);
}
}

Results in: Warning: mysqli_close() [function.mysqli-close]: Couldn't fetch mysqli in

I have these two classes:
Code: [Select]
<?php
class A {
private $id;
public function __construct() {
$this->id = '11111';
}
public function getProperty($prop) {
return $this->$prop;
}
}?>
Code: [Select]
<?php
class B extends A {
private $message = "Nope, can't see it";
public function __construct() {
parent::__construct();
$this->message = "Yep, I can see it";
}
}?>
I tried this, but it just outputs the id (the first call)
Code: [Select]
$class = new B;
echo $class->getProperty('id');
echo $class->getProperty('message');
Why is that? I thought I could use a parent method on a child property..


*EDIT* Using a public or protected visibility on the message property gets me the output I expect...how come?

Hello i have two questions, regarding my problem.
1. I have a script which uses call_user_func_array , i heard it is not the best solution, here i post my script, please tell me what can i use instead of call_user_func_array, of course if the rumours are true that it is not the best solution.

2. My second question is that i get a warning message, if i turn error_reporting on:
'Warning: Wrong parameter count for array_intersect() in index.php on line xxx'
However the site displays properly, but i want to get rid of this error message, why is it appearing what is the problem.

My script:

Code: [Select]
$result = mysql_query("select id from table where word = '". $value ."');

while ($row = mysql_fetch_array($result, MYSQL_NUM)) {
                  $query_results[$value][] = $row[0];

            }
           
  $ids = call_user_func_array('array_intersect', $query_results);

Is there a call_user_func_array() alternative other than eval()? With the shear genius of some of the individuals on this forum, I'd expect that if there is an alternative, someone here would know it. Any tips or insight greatly appreciated. Thanks

Background (blah blah blah)
I'm being kinda picky on efficiency and performance since I will be looking at possible hundreds of executions a request... so I'd like to avoid using the above mentioned functions since they take ~3x and ~10x longer (according to a this comment).

This probably doesn't matter much, but I am using a 'Display' class for final output to the browser.

The class will display the obvious HTML header and then display either the full site or the mobile site.

It also displays the CSS / JS (which is previously selected in the page-specific controller code as there are variations based on server-side checks).

Basically it is the ONLY class that actually needs to send anything to the browser.

When I begin output and echo inside the class, that is the end of the script - there is no more server-side code to execute.

If I shouldn;t echo inside the class, is it that bad to do so?

Hi,

Im wondering if there is an easy way to get items out of an array returned by a function inside a class.   A code example would be:

Code: [Select]
class modDB {

public function getPwdSalt() {
$arr = array("salt", "password");
return $arr;
}

}
?>
And what i would like to be able to do is something like:

Code: [Select]
$modDB = new modDB;

echo $modDB->getPwdSalt()->[1];
and just get returned 'password'.  Is something like that possible?

Many Thanks.

Hi, I'm having a bit of a problem understanding why I'm not able to use the class I'm extending off of functions.

I have a category class that extends off my core class, inside that category class, I'm able to use the core functions and variables inside all custom functions, but not the __construct function.

So, to be clear, inside class class, I'm able to call $this->core->function() inside custom functions, such as function add_parent(), but not the __construct function.

Why is this happening, what is the logic behind this?

This is how I'm extending the class off of the core class:
Code: [Select]
<?php
$core  = new core;
$parent = new parents;
$parent->core =& $core;
?>

With this, like I said, I'm able to use all of my core functions inside all other classes called this way, so inside all of the other classes I can do:
Code: [Select]
<?php $this->core->function(); ?>everywhere besides __construct().

Do I not have the class called properly? Do I need to pass my core class through differently? How can I fix this?

Thanks.

The page that I'm currently working on has a form which allows, through a series of check boxes and text entry fields, a dynamic mysql query to be created. The php code constructs the query based on which fields the user updated in order to find a specific user in the database. Everything was working fine until I started to only display part of the result set. In order to display a message similar to "Displaying 12-25 of 65 results." I ran the query twice. Once to get the total number of results, and once to only get the specified set.

The code for the section producing the error is included below. The elseif statement works as desired, as does the initial query of the if statement.
if (isset($sql) && $sql !=""){
$sql = "SELECT DISTINCT users.StudentID FROM users lEFT JOIN events ON users.StudentID=events.StudentID WHERE" . $sql;
$stmt = $mysqli->prepare($sql);
call_user_func_array(array(&$stmt, 'bind_param'), $array_of_params);
$stmt->execute();
$stmt->store_result();
$total= $stmt->num_rows;
$stmt->close();
$sql = "SELECT DISTINCT users.StudentID,users.FirstName,users.LastName,users.Email,users.Phone,users.Texting,users.Admin,users.HDHS,users.Sex,users.Confirmation FROM users lEFT JOIN events ON users.StudentID=events.StudentID WHERE" . $sql . " ORDER BY LastName,FirstName LIMIT " . $_GET['start'] . ",12";
$stmt = $mysqli->prepare($sql);
call_user_func_array(array(&$stmt, 'bind_param'), $array_of_params);
$stmt->bind_result($row['StudentID'],$row['FirstName'],$row['LastName'],$row['Email'],$row['Phone'],$row['Texting'],$row['Admin'],$row['HDHS'],$row['Gender'],$row['Confirmation']);

}
elseif(isset($_GET['submit']) || isset($_GET['earlier']) || isset($_GET['later'])){
$stmt = $mysqli->prepare("SELECT StudentID,FirstName,LastName,Email,Phone,Texting,Admin,HDHS,Sex,Confirmation FROM users ORDER BY LastName,FirstName");
$stmt->bind_result($row['StudentID'],$row['FirstName'],$row['LastName'],$row['Email'],$row['Phone'],$row['Texting'],$row['Admin'],$row['HDHS'],$row['Gender'],$row['Confirmation']);
$stmt->execute();
$stmt->store_result();
$total= $stmt->num_rows;
$stmt = $mysqli->prepare("SELECT StudentID,FirstName,LastName,Email,Phone,Texting,Admin,HDHS,Sex,Confirmation FROM users ORDER BY LastName,FirstName LIMIT " . $_GET['start'] . ",12");
$stmt->bind_result($row['StudentID'],$row['FirstName'],$row['LastName'],$row['Email'],$row['Phone'],$row['Texting'],$row['Admin'],$row['HDHS'],$row['Gender'],$row['Confirmation']);
$stmt->execute();
}


If anyone would be willing to help me out here it would be greatly appreciated. If you need more information let me know. Thank you!