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PHP - Flexible Class Loading
Lets say that I have an array that I want to convert to a value object
My value object class is as follows: /* file UserVO.php*/ class UserVO { public $id; public $email; public function __construct($data) { $this->id = (int)$data['id']; $this->email = $data['email']; } } And I create my array of value objects as follows: /* file UserService.php*/ $array = array( array(...), array(...)); $count = count($array); for ($i = 0; $i < $count; $i++) { $result[] = new UserVO($array[$i]); } return $result; OK, so this all works fine. However, I'd like to specificy the VO that is to be created dynamically, so that I can have a single dynamic function to create my VO's. Something like: $ret = create_vo($array, 'UserVO'); function create_vo($data, $vo) { $count = count($data); for ($i = 0; $i < $count; $i++) { $result[] = new $vo($array[$i]); //this obviously wont work...Class name must be a valid object or a string } return $result; } I realise that I could do this with a switch statement (iterating through all my VO's)...but there is no doubt a much much more elegant solution. It would also be supercool if I could lazy load the VO's as needed, instead of having multiple 'includes' Any help much appreciated. Similar Tutorialshey guys im having a problem with my class it sees the constructor isnt loading and this line isnt executed Code: [Select] spl_autoload_register(array($this, 'load_class')); i dont see why not if anyone can help please Code: [Select] <?php class Autoloader { private static $_declared_classes = array(); private static $_ignore_files = array(); public function __construct() { spl_autoload_register(array($this, 'load_class')); } public static function load_class($class_name) { $class_name = ucwords($class_name); $file = self::get_class_path($class_name); try { if (!class_exists($class_name, FALSE)) { if (file_exists($file)) { require_once $file; self::$_declared_classes[] = $class_name; } else { throw new Exception(sprintf("Class '%s' not found.<br />\n", $class_name)); } } } catch (Exception $e) { echo $e->getMessage(); } } private static function get_class_path($class_name) { global $classes; if (array_key_exists($class_name, $classes)) { return ROOT . DS . $classes[$class_name]; } } public static function declared_classes() { echo "<pre>"; print_r(self::$_declared_classes); echo "</pre>"; } ?> I've been trying to solve this for a while now, but still haven't had any luck. What I'm trying to do is this: $class = new BaseClass; $var = $class->load("subclass")->subclass_function("info"); Thanks in advance Ayon Hi folks, this is my first post to phpfreaks so I wanted to start with a discussion regarding flexible and testable PHP designs, something I'm struggling with. I'm trying to design a couple of components for a PHP project that I'm working on. It relies on the Zend Framework and is covered by PHPUnit tests. I have two sub-systems: video storage manager and user account manager. I need help with the design of these managers. They need to be developed in a way that allows me to swap out the backend (what actually does the video storing / user handling) with minimal changes to systems that depend on these managers. Since I'm using the Zend Framework these managers will be used in various controllers. I'm using PHPUnit to test the controllers (as outlined in the Zend Framework's Documentation- Zend_Test_PHPUnit) and it is possible that the managers' backend will be provided by 3rd party classes (or wrappers around 3rd party classes). So the design must allow the backend to be easily mocked. I'm interested in hearing some of the various approaches for designing the video storage and user account managers and their backend classes / wrappers. - Nick I have a menu-item that links to for example example.com?page=y Then I need my php code to pull that "y" and put it in "include("pages/'$thatpage'.php");" Got this, that doesn't work: if (isset($_GET['page']) && $_GET['page'] == $page) { include("pages/'$page'.php"); } else { include("pages/index.php"); } ^ $page should then become the desired page, for example "y" This does though: if (isset($_GET['page']) && $_GET['page'] == y) { include("pages/y.php"); } else { include("pages/index.php"); } But i need it to be flexible, so i don't have to update my file every time i add a new page. Hello dear php-experts - good day. note; i run linux opensuse 13.1 the final goal is to get stored some xml-files in a mysql-database. thats what i am looking for. - the xml-files are derived from a osm-request - at a OpenSteetpmap-api. and thats why i am here. Guess that you are good php and mysql-experts well i play around with some openstreetmap-requests - and want to store the results in a Mysql-db. see the tags: id lat lon name amenity operator vendingsee the table 'pois' that i want to create - and subsequently create some columns see the SQL-Script CREATE DATABASE `db123` DEFAULT CHARACTER SET latin1 COLLATE latin1_german2_ci; USE hans; CREATE TABLE `pois` ( `id` BIGINT(20) UNSIGNED NOT NULL, `lat` FLOAT(10,7) NOT NULL, `lon` FLOAT(10,7) NOT NULL, `name` VARCHAR(255) COLLATE utf8_bin NOT NULL, `amenity` VARCHAR(255) COLLATE utf8_bin NOT NULL, `operator` VARCHAR(255) COLLATE utf8_bin NOT NULL, `vending` VARCHAR(255) COLLATE utf8_bin NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin; first of all i thought that i can do the db creation with some hard coded methods: but instead of hard-coding the required column names as in $fields = array('id','lat','lon','name','amenity','operator','vending'); we could use this to pick up any additional columns added to your pois table
$sql = "SHOW COLUMNS FROM pois";
$fields = array();
$res = $db->query($sql);
while ($row = $res->fetch_row()) {
$fields[] = $row[0];
}
btw: see the data <node id="2064639440" lat="49.4873181" lon="8.4710548"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="turkish"/> <tag k="email" v="info@lynso.de"/> <tag k="name" v="Kilim - Café und Bar Restaurant"/> <tag k="opening_hours" v="Su-Th 17:00-1:00; Fr, Sa 17:00-3:00"/> <tag k="operator" v="Cengiz Kaya"/> <tag k="phone" v="06 21 - 43 755 371"/> <tag k="website" v="http://www.kilim-mannheim.de/"/> </node> <node id="2126473801" lat="49.4851170" lon="8.4756295"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="italian"/> <tag k="email" v="mannheim1@vapiano.de"/> <tag k="fax" v="+49 621 1259 779"/> <tag k="name" v="Vapiano"/> <tag k="opening_hours" v="Su-Th 10:00-24:00; Fr-Sa 10:00-01:00"/> <tag k="operator" v="Vapiano"/> <tag k="phone" v="+49 621 1259 777"/> <tag k="website" v="http://www.vapiano.de/newsroom/?store=29"/> <tag k="wheelchair" v="yes"/> </node> <node id="667927886" lat="49.4909673" lon="8.4764904"> <tag k="addr:city" v="Mannheim"/> <tag k="addr:country" v="DE"/> <tag k="addr:housenumber" v="5"/> <tag k="addr:postcode" v="68161"/> <tag k="addr:street" v="Collinistraße"/> <tag k="amenity" v="restaurant"/> <tag k="name" v="Churrascaria Brasil Tropical"/> <tag k="phone" v="+496211225596"/> <tag k="wheelchair" v="limited"/> </node> <node id="689928440" lat="49.4798794" lon="8.4853418"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="greek"/> <tag k="email" v="epirus70@hotmail.de"/> <tag k="fax" v="0621/4407 762"/> <tag k="name" v="Epirus"/> <tag k="opening_hours" v="Mo-Sa 12:00-15:00,18:00-24:00"/> <tag k="phone" v="0621/4407 761"/> <tag k="smoking" v="separated"/> <tag k="website" v="http://epirus-ma.blogspot.com/"/> <tag k="wheelchair" v="no"/> </node> <node id="689928445" lat="49.4799409" lon="8.4851357"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="italian"/> <tag k="email" v="gianlucascurti@ristorante-augusta.de"/> <tag k="name" v="Ristorante Augusta"/> <tag k="opening_hours" v="Mo-Fr 12:00-14:00,18:00-23:00;Su 12:00-14:00,18:00-23:00"/> <tag k="phone" v="0621 449872"/> <tag k="website" v="ristorante-augusta.com/"/> <tag k="wheelchair" v="no"/> </node> with the following fields in the db: CREATE DATABASE `db123` DEFAULT CHARACTER SET latin1 COLLATE latin1_german2_ci; USE hans; CREATE TABLE `pois` ( `id` BIGINT(20) UNSIGNED NOT NULL, `lat` FLOAT(10,7) NOT NULL, `lon` FLOAT(10,7) NOT NULL, `name` VARCHAR(255) COLLATE utf8_bin NOT NULL, `amenity` VARCHAR(255) COLLATE utf8_bin NOT NULL, `operator` VARCHAR(255) COLLATE utf8_bin NOT NULL, `vending` VARCHAR(255) COLLATE utf8_bin NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin; EDITED BY MODERATOR - DB CREDENTIALS REMOVED see the dataset; - which is stored in the file mysql.txt the dataset - it is gathered from the request on the overpass-api which resides here http://www.overpass-turbo.eu cf. http://overpass-turb...Pg&c=BNJBWRBb1P you see a request on the left part of the screen note: to get the output - just press the button in the top-menu called "Ausführen" after this you press the button called "DATEN" on the top-right - just below the green button called "flatter this": after pressing this "DATEN"-button you see the data in the right window of the screen. note - it has got various ids - that means that the osm-file does not give back constantly all the tags... the last question; does this make any problems to our project - does this has any influence on our db-connection...!?!? see the output he <node id="2064639440" lat="49.4873181" lon="8.4710548"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="turkish"/> <tag k="email" v="info@lynso.de"/> <tag k="name" v="Kilim - Café und Bar Restaurant"/> <tag k="opening_hours" v="Su-Th 17:00-1:00; Fr, Sa 17:00-3:00"/> <tag k="operator" v="Cengiz Kaya"/> <tag k="phone" v="06 21 - 43 755 371"/> <tag k="website" v="http://www.kilim-mannheim.de/"/> </node> <node id="2126473801" lat="49.4851170" lon="8.4756295"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="italian"/> <tag k="email" v="mannheim1@vapiano.de"/> <tag k="fax" v="+49 621 1259 779"/> <tag k="name" v="Vapiano"/> <tag k="opening_hours" v="Su-Th 10:00-24:00; Fr-Sa 10:00-01:00"/> <tag k="operator" v="Vapiano"/> <tag k="phone" v="+49 621 1259 777"/> <tag k="website" v="http://www.vapiano.de/newsroom/?store=29"/> <tag k="wheelchair" v="yes"/> </node> <node id="667927886" lat="49.4909673" lon="8.4764904"> <tag k="addr:city" v="Mannheim"/> <tag k="addr:country" v="DE"/> <tag k="addr:housenumber" v="5"/> <tag k="addr:postcode" v="68161"/> <tag k="addr:street" v="Collinistraße"/> <tag k="amenity" v="restaurant"/> <tag k="name" v="Churrascaria Brasil Tropical"/> <tag k="phone" v="+496211225596"/> <tag k="wheelchair" v="limited"/> </node> <node id="689928440" lat="49.4798794" lon="8.4853418"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="greek"/> <tag k="email" v="epirus70@hotmail.de"/> <tag k="fax" v="0621/4407 762"/> <tag k="name" v="Epirus"/> <tag k="opening_hours" v="Mo-Sa 12:00-15:00,18:00-24:00"/> <tag k="phone" v="0621/4407 761"/> <tag k="smoking" v="separated"/> <tag k="website" v="http://epirus-ma.blogspot.com/"/> <tag k="wheelchair" v="no"/> </node> <node id="689928445" lat="49.4799409" lon="8.4851357"> <tag k="amenity" v="restaurant"/> <tag k="cuisine" v="italian"/> <tag k="email" v="gianlucascurti@ristorante-augusta.de"/> <tag k="name" v="Ristorante Augusta"/> <tag k="opening_hours" v="Mo-Fr 12:00-14:00,18:00-23:00;Su 12:00-14:00,18:00-23:00"/> <tag k="phone" v="0621 449872"/> <tag k="website" v="ristorante-augusta.com/"/> <tag k="wheelchair" v="no"/> </node> well you see that i have some questions the second one is regarding the variations in the mysql.txt - file - i.e. the different number of tags.; How to make the script robust so that it is able to work with this - and does not stopt to work....!? well i hope i was able to make clear what i want to achieve: can i use the code snippet to create the db table - we could use this to pick up any additional columns added to your pois table
$sql = "SHOW COLUMNS FROM pois";
$fields = array();
$res = $db->query($sql);
while ($row = $res->fetch_row()) {
$fields[] = $row[0];
}
note: i need to have a robust way - where i can cope with xmlfiles that are
full with additionals tags /(that make it necessary to have more collumns added.
I look forward to hear from youmany many greetings Hey all, If I want to have a category which can have subcategories, which in turn can have its own subcategories or belong to the parent category, and the subcategories can have more than one parent categories, is the most effective way to design this is to create a categories table and categories_join table where the categories table has a foreign key categories_join_id linking it to the categories_join table and the categories_join table has a field called parent_id which associates with the primary key of the categories table, therefore allowing me to have multiple subcategories to one category: categories_join table id parent_id 1 2 1 3 categories table id categories_join_id 1 1 2 2 3 3 So from the example above, the first category has two parents, category 2 and category 3. As an alternative option, in this post: http://stackoverflow.com/questions/5384183/database-design-question-categories-subcategories The second answer down mentions to use recursive programming? But he doesn't give an example of what he means. Is he saying you have a function call itself passing it parameters as to what the parent should be: function getParent($category,$parents = array()){ } Thanks for response. 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 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? 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 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. 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. Hi people! class FirstOne{ public function FunctionOne($FirstInput){ //do stuff and output value return $value1; } } Then:- class SecondOne{ public function FunctionTwo($AnotherInput){ //do stuff and output value return $value2; } } What I want to know is this, if I want to use FunctionOne() in Class SecondOne do I do it like this:- (Assume as I have instantiated the first class using $Test = new FirstOne(); ) class SecondOne{ function SecondedFunction(){ global $Test; return $Test->FunctionOne(); } public function FunctionTwo($AnotherInput){ //do stuff and output value return $value2; } public function FunctionThree(){ //some code here $this->Test->SecondedFunction();<--I think as I can omit the $this-> reference } } My point is: Do I have to do it this way or is there way of having this done through __construct() that would negate the need for a third party function? I have a version working, I just think that it is a little convoluted in the way as I have done it, so I thought I would ask you guys. Any help/advice is appreciated. Cheers Rw I have two classes: ## Admin.php <?php class Admin { public function __construct() { include("Config.php"); } /** * deletes a client * @returns true or false */ function deleteClient($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? Hi all, I have two classes. Registration and Connection. Inside a registration.php I include my header.php, which then includes my connection.php... So all the classes should be declared when the page is loaded. This is my code: registration.php: <?php include ('assets/header.php'); ?> <?php class registration{ public $fields = array("username", "email", "password"); public $data = array(); public $table = "users"; public $dateTime = ""; public $datePos = 0; public $dateEntryName = "date"; function timeStamp(){ return($this->dateTime = date("Y-m-d H:i:s")); } function insertRow($data, $table){ foreach($this->fields as $key => $value){ mysql_query("INSERT INTO graphs ($this->fields) VALUES ('$data[$key]')"); } mysql_close($connection->connect); } function validateFields(){ $connection = new connection(); $connection->connect(); foreach($this->fields as $key => $value){ array_push($this->data, $_POST[$this->fields[$key]]); } $this->dateTime = $this->timeStamp(); array_unshift($this->data, $this->dateTime); array_unshift($this->fields, $this->dateEntryName); foreach($this->data as $value){ echo "$value"; } $this->insertRow($this->data, $this->table); } } $registration = new registration(); $registration->validateFields(); ?> <?php include ('assets/footer.php'); ?> At this point I cannot find my connection class defined on another included/included page. $connection = new connection(); $connection->connect; config.php (included within header.php) <? class connection{ public $dbname = '**'; public $dbHost = '**'; public $dbUser = '**'; public $dbPass = '**'; public $connect; function connect(){ $this->connect = mysql_connect($this->dbHost, $this->dbUser, $this->dbPass) or die ('Error connecting to mysql'); mysql_select_db($this->dbname, $this->connect); } } ?> Any ideas how to call it properly? I have a class in which I have a function called connection. I am now trying to call this function from another class, but it will not work. It works if I put the code in from the other function rather than calling it but that defeats the purpous. class locationbox { function location() { $databaseconnect = new databaseconnect(); $databaseconnect -> connection();{ $result = mysql_query("SELECT * FROM locations"); while($row = mysql_fetch_array($result)) // line that now gets the error, mysql_fetch_array() expects parameter 1 to be resource, boolean given //in { echo "<option>" . $row['location'] . "</option>"; } } }} I do know how to do this but I am curious about whether or not there is a "preferred" way to do this. I know there are a couple ways to use a class (I'll call Alpha_Class) within another class (I'll class Beta_Class) Let's say we have this simple class (Beta_Class): class beta { function foo(){ } } If I wanted to use the Alpha Class within the Beta Class, I could any number of things. For example: class beta { function foo(){ $this->alpha = new alpha; //$this->alpha->bar(); } } Or you could simply use the $GLOBALS array to store instantiated objects in: $GLOBALS['alpha'] = new alpha; class beta { function foo(){ //GLOBALS['alpha']->bar(); } } You could even declare Alpha_Class as a static class and thus would not need to be instantiated: static class alpha { static function bar(){} } class beta { function foo(){ //alpha::bar(); } } Those are the only ways I can think of right now. Are there any other ways to accomplish this? I was wondering which way is the best in terms of readability and maintainability. How does one go about using one class inside another? For example, building a class that does some series of functions, and uses a db abstraction layer class in the process? Well the title may seem a bit confusing, but heres an example: Code: [Select] <?php class User{ public $uid; public $username; protected $password; protected $email; public $usergroup; public $profile; public function __construct($id){ // constructor code inside } public function getemail(){ return $this->email; } public function getusergroup(){ return $this->usergroup; } public function getprofile(){ $this->profile = new UserProfile($this->uid); } } class UserProfile(){ protected $avatar; protected $bio; protected $gender; protected $favcolor; public function __construct($id){ // constructor code inside } public function formatavatar(){ // avatar formatting code inside } public function formatusername(){ // format username? } } ?> As you can see, the User class(an outer class) has a property called Profile, which can be instantiated as a UserProfile object(an inner class). The two objects have distinct functionalities, but there are times when the UserProfile object needs to access property and methods from the user object. I know its easy for outer class to access methods from inner class by using the single arrow access operator twice, but how about the other way around? Lets say from the above example the userprofile can format the username displayed to the screen by adding a sun to the left of the username if the usergroup is admin, a moon if the usergroup is mod, and nothing if its just a member. The usergroup property is stored in the outer class, and can be accessed with this $user->getusergroup() method only. I know I can always do the hard way by passing a user object to the method's argument, but is there an easier way for the inner class UserProfile to access properties/methods for outerclass User? If so, how can I achieve that? Hey guys, Problem: php script keeps loading and i dont know why. What I've done so far is commenting out line-by-line so I found out that the problem is somewhere he Code: [Select] <div id="wrapper"> <div id="inner"> <div id="top"> <?php require 'basic/logo.php';?> <?php require 'basic/header.php';?> </div> its not working - keeps loading. Commenting out the 'required' stuff it works... error_reporting(E_ALL); is on... what the hell is the problem?! the files are there in /basic. Just dont know any further! |
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