PHP - Assigning The Visibility Of Methods
I just have a quick question, what happens if I don't assign a visibility element to methods?
In other words, if I just have: [php] class Article_model { public $data; function index() { return $data; } [php] ...instead of declaring public, private, static, and so on before the function. Will php just consider it public? Similar TutorialsWell 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. 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. I have some questions about the scope of navigation : if i define a constant like define('constant'), php manuel says it's global, does this mean that i can use of different files also? like, i defined in define.php and used in anotherfile.php, or shoud the latter file be included then? what about file a.php includes file b.php which in turn includes file c.php. Can functions of a use variables of file c? ultimately: what about variables that are declared global inside a function but this variables is not initialized in that script, like in wordpress: function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) { global $wp_locale; // more code } $wp_locale can be initialized in another script file? thanks in advance hey guys im wdondering if there's a magic method which works like
__GET()but allows you to put a parameter in...thank you <?php class test { public function run() { $this->object->('string'); // __get with parameter? } public function __get($value) { return $this->{$value} } } ?> what are magic methods? when do we need to use magic methods? what are the advantages of using magic methods? thanks in advanced. I don't know if this belongs here; sorry if it doesn't. I'm using a method=get on a form as I need to pass information through a URL once the form has been submitted. But I also need to INSERT some data from that form to multiple tables. - How can I stop the GET from passing my other variables into the URL? - How do I make the form submit to itself? I need to use the 'index.php?p=checkout' as this matches with a switch statement, which matches to the checkout page. The function PHP_SELF will just refresh to the index.php page, which will not have any of this checkout's page validation. Here's my code: Code: [Select] <h2>Please enter your details</h2> <h3>All fields required</h3> <div id="checkout"> <?php if (isset($_GET['checkout'])){ require_once ('./includes/connectvars.php'); $title = $_GET['title']; $fname = $_GET['fname']; $sname = $_GET['sname']; $ctype = $_GET['ctype']; $cnumber = md5($_GET['cnumber']); $syear = $_GET['smonth'] . $_GET['syear']; $fyear = $_GET['fmonth'] . $_GET['fyear']; $service = $_GET['cardAuth']; $amount = $_REQUEST[$total]; $msg = rand(1000,9999); $api = 'd41d8cd98f00b204e9800998ecf8427e'; $b_house = $_GET['b_house']; $b_postcode = $_GET['b_postcode']; $b_city = $_GET['b_city']; $b_country = $_GET['b_country']; $d_house = $_GET['d_house']; $d_postcode = $_GET['d_postcode']; $d_city = $_GET['d_city']; $d_country = $_GET['d_country']; $dbc = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME); $query = "INSERT INTO customer (cust_id, first_name, last_name) VALUES ('', '$fname', '$sname') "; $query = "INSERT INTO bill (cust_id) VALUES ('') "; $query = "INSERT INTO deliver (cust_id) VALUES ('') "; mysqli_query($dbc, $query); } //.'service='.$service.'msg_id='.$msg.'num_md5='.$cnumber.'amount='.$amount.'currency=GBP'.'api_key='.$api. ?> <form method="get" action="index.php?p=checkout"> <table> <tr> <td><input type="hidden" name="cardAuth" /></td> </tr> <tr> <td> Title: </td> <td> <select name="title" value="<?php if (!empty($title)) echo $title; ?>" > <option></option> <option>Mr</option> <option>Sir</option> <option>Ms</option> <option>Miss</option> <option>Mrs</option> </select> </td> </tr> <tr> <td> First Name: </td> <td> <input type="text" name="fname" value="<?php if (!empty($fname)) echo $fname; ?>"/> </td> </tr> <tr> <td> Surname: </td> <td> <input type="text" name="sname" value="<?php if (!empty($sname)) echo $sname; ?>"/> </td> </tr> <tr> <td> </td> </tr> <tr> <td> Card Type: </td> <td> <select name="ctype" value="<?php if (!empty($ctype)) echo $ctype; ?>"> <option>mastercard</option> <option>visa</option> <option>amex</option> <option>solo</option> <option>maestro</option> <option>jcb</option> <option>diners</option> </select> </td> </tr> <tr> <td> Card Number: </td> <td> <input type="text" name="cnumber" value="<?php if (!empty($cnumber)) echo $cnumber; ?>"/> </td> </tr> <tr> <td> Valid From: </td> <td> <select name="smonth" value="<?php if (!empty($smonth)) echo $smonth; ?>"> <option>01</option> <option>02</option> <option>03</option> <option>04</option> <option>05</option> <option>06</option> <option>07</option> <option>08</option> <option>09</option> <option>10</option> <option>11</option> <option>12</option> </select> <select name="syear" value="<?php if (!empty($syear)) echo $syear; ?>"> <option>07</option> <option>08</option> <option>09</option> <option>10</option> <option>11</option> </select> </td> </tr> <tr> <td> Expires End: </td> <td> <select name="fmonth" value="<?php if (!empty($fmonth)) echo $fmonth; ?>"> <option>01</option> <option>02</option> <option>03</option> <option>04</option> <option>05</option> <option>06</option> <option>07</option> <option>08</option> <option>09</option> <option>10</option> <option>11</option> <option>12</option> </select> <select name="fyear" value="<?php if (!empty($fyear)) echo $fyear; ?>"> <option>10</option> <option>11</option> <option>12</option> <option>13</option> <option>14</option> </select> </td> </tr> <tr> <td><h4>Billing Address</h4></td> </tr> <tr> <td> House Name/ Number: </td> <td> <input type="text" name="b_house" /> </td> </tr> <tr> <td> Postcode </td> <td> <input type="text" name="b_postcode" /> </td> </tr> <tr> <td> City: </td> <td> <input type="text" name="b_city" /> </td> </tr> <tr> <td> Country: </td> <td> <input type="text" name="b_country" /> </td> </tr> <tr> <td><h4>Delivery Address</h4></td> </tr> <tr> <td> House Name/ Number: </td> <td> <input type="text" name="d_house" /> </td> </tr> <tr> <td> Postcode </td> <td> <input type="text" name="d_postcode" /> </td> </tr> <tr> <td> City: </td> <td> <input type="text" name="d_city" /> </td> </tr> <tr> <td> Country: </td> <td> <input type="text" name="d_country" /> </td> </tr> <tr> <td> </td> </tr> <tr> <td> </td> <td> <input type="submit" name="checkout" value="Checkout"/> </td> </tr> </table> </form> </div> Hi PhpFreaks, I have a method that I need to be initialised dynamically and I am not sure if the code below will work I have been able to workout if the method exists but I have not found a way to it get to return the array. Has anyone go any ideas? The error I get is: Catchable fatal error: Object of class Forms could not be converted to string Code: [Select] public function setMethodForms($methodName){ echo $methodName." and does it exist ". (int)method_exists($this->formsObj, $methodName); //test to see if the method exists if ((int)method_exists($this->formsObj, $methodName) == 1){ //if it does execute //print_r ($this->formsObj->projects()); //test to see if object works $return call_user_func($this->formsObj."->".$methodName."()"); } return $return; } I have two classes were one extends the other but they both have magic methods __get __call and __set but when trying to call a magic method it conflicts one with the other as you can imagaine...is there a way of getting around this ie. name spaces
or do I simply have to rewrite my classes
thank you
Hey everyone. I have been trying to assign dates to image so I could sort them, and also display the date they were uploaded. But I need some help. I have a script that uploads an image to a file directory, and also stores the file directory and the upload date in a database. And I also have a script that displays the images in the file directory but I cannot find a way to assign the right date to the right image. Here is the script that displays the images: Code: (php) [Select] if (isset($_POST['submit'])) { // fill an array with all items from a directory $dir = "thumbs/"; $handle = opendir($dir); while ($file = readdir($handle)) { $files[] = $file; // This removes the full stops from the array unset($files[0]); unset($files[1]); } foreach($files as $fileimg) { echo "<img src='". $dir . $fileimg ."'/>\n"; echo "$date"; } } and here is the script for calling the date from the database: Code: [Select] $query = mysql_query("SELECT imgaddress, uploaddate FROM thumbs WHERE imgaddress='" . $dir . $file . "'"); if (mysql_num_rows($query) == 1) { $row = mysql_fetch_assoc($query); $date = $row['uploaddate']; If I use the database statement before the foreach, then it does not get the right file directory, but if I call it inside the foreach, then I cannot use krsort() to sort the array. Any help would be greatly appreciated, thanks Good Day Everyone! I'm having trouble figuring out how to assign weapons from a MySQL table to soldiers. Say I have the following... $soldiers = 100; $damage = 0; $q = mysql_query("SELECT `item_quantity`, `item_power` FROM `items` WHERE `owner_id`='".$userid."' ORDER BY `item_power` DESC"); while($row = mysql_fetch_assoc($q)) { // assign weapons to soldiers and add `item_power` * `item_quantity`to $damage } I want to assign all the weapons until there's not enough soldiers to assign them to, and I want to assign them in order of `item_power` descending. I'm sure this is really simple, I just can't for the life of me get my head around it. Thanks in advance! Kind Regards, Ace I can't find an explicit answer on this anywhere, but when you create a child class from an abstract class must you use ALL of the methods that are inside the abstract class in the new child class? Or are these methods just available to the child class to pick and choose?
Hi, I am trying to get my head around classes, interfaces and methods for different animals
this is what I have so far: <?php interface animal { function walk(); function fly(); function swim(); } class monkey implements animal{ const interface1 = "I am from test class"; function noise() { echo "ooh ooh ah ah!"; } function walk() { echo "monkey is walking"; } function fly() { echo "monkey is Flying"; } function swim() { echo "monkey is Swimming"; } public function display() { echo monkey::interface1; echo PHP_EOL; } } class bear implements animal{ const interface1 = "I am from test class"; function noise() { echo "Grrr!"; } function walk() { echo "Bear is walking"; } function fly() { echo "Bear is Flying"; } function swim() { echo "Bear is Swimming"; } public function display() { echo bear::interface1; echo PHP_EOL; } } $Obj = new monkey(); $Obj->display(); $Obj1 = new bear(); $Obj1->display(); ?> I'm a bit stumped as animal interface not calling all functions?! please help Is there any way to produce a custom magic method? Let's say when I try to get an attribute that doesn't have any value, a method gets called that gives that attribute a value. So I want a method to be triggered when I try to get a value from an attribute that doesn't have any value. Hi all, I can't seem to designate an array key by using a variable and I was wondering if this is possible. I'm looking to do something like this: Code: [Select] <?php $key = "apple"; $arr = array($key => "fruit"); ?> Any suggestions would be appreciated! hello, i have been following the php.net oop manual but im having a little trouble understanding something. on this page in the manual: http://uk3.php.net/manual/en/language.oop5.basic.php it shows this code and if i seperate it out i cant get it to echo the results i want. what am i doing wrong? i have added a little extra code . class Bear Code: [Select] class Bear { // define properties public $name; public $weight; public $age; public $sex; public $colour; // constructor public function __construct() { $this->name = "winny the poo"; $this->weight = 100; $this->age = 0; $this->sex = "male"; $this->colour = "brown"; } // define methods public function eat($units) { echo $this->name." is eating ".$units." units of food... <br/>"; $this->weight += $units; } public function run() { echo $this->name." is running... <br/>"; } public function kill() { echo $this->name." is killing prey... <br/>"; } public function sleep() { echo $this->name." is sleeping... <br/>"; } } class PolarBear Code: [Select] class PolarBear extends Bear { // constructor public function __construct() { parent::__construct(); $this->colour = "white"; $this->weight = 600; } function polarbar() { // Note: the next line will issue a warning if E_STRICT is enabled. Bear::bear(); } // define methods public function swim() { echo $this->name." is swimming... "; } } now if i try to get back the results i have trouble. this is fine Code: [Select] $bear = new Bear(); $bear->eat($units); $bear->eat(); $bear->run(); $bear->kill(); $bear->sleep(); that echos back Quote //THE BEAR winny the poo is eating 5 units of food... winny the poo is eating units of food... winny the poo is running... winny the poo is killing prey... winny the poo is sleeping... //THE POLAR BEAR winny the poo is eating 5 units of food... winny the poo is eating units of food... winny the poo is running... winny the poo is killing prey... winny the poo is sleeping... winny the poo is swimming... THAT FINE but how come i can echo out each of the properties? why do these ways not work? Code: [Select] Bear::eat($units); Bear::eat(); Bear::run(); Bear::kill(); Bear::sleep(); or Code: [Select] $bear = new Bear(); $bear->$name; $bear->$weight; $bear->$age; $bear->$sex; $bear->$colour; or Code: [Select] echo Bear::eat($units); echo Bear::eat(); echo Bear::run(); echo Bear::kill(); echo Bear::sleep(); or Code: [Select] $bear = new Bear(); echo $bear->$name; echo $bear->$weight; echo $bear->$age; echo $bear->$sex; echo $bear->$colour; and the same goes for PolarBear if i try and get back any of the properties on a page i get nothing ??? i even tried putting it in a loop and that didnt work Code: [Select] $bear = new Bear(); foreach ($bear as $bears){ echo $bears->$name; echo $bears->$weight; echo $bears->$age; echo $bears->$sex; echo $bears->$colour; } whats wrong. why cant i get any results from these ? thanks I am trying to run the function "age", using the last line, I thought that is how I could to access that method, but that doesn't work. Code: [Select] <?php require_once '../phpLive/phpLive.php'; $live->myClass = (object)array( "name" => "Billy Bob Joe", "age" => function($dob){ // Run some code } ); echo $live->myClass->age("1986-07-22"); ?> I get the following error when trying to do that. Quote Fatal error: Call to undefined method stdClass::age() in /xxx/new.plugin.php on line 9 Any Ideas how I can access that method? Thanks! I need to assign unknown array keys and their values to strings. The code I am using is: Code: [Select] $cart = $_SESSION['cart']; $items = explode(',',$cart); $qty = array(); foreach ($items as $item) { $qty[$item] = $qty[$item] + 1; } print_r($qty); The keys change and are not ordered. I do not know what the key or it's value may be. So as an example, I might have: Code: [Select] Array ( [2] => 5 [4] => 8 ) or in a different scenario, I might have: Code: [Select] Array ( [1] => 6 ) What those numbers represent is a product id (the key), and the quantity (the value of the key). Can someone help me to assign these to a string? I have been reading all morning, and not making any progress. Thank you! hi, i am updating records from database using ajax and javascript on php page. The result is displayed inside a div (<div id="show"></div>). Now i want to assign the content of the above div(say y) to php variable for further calculations. How can i assign the value displayed in div tag to a php variable? Thanks. Hi, I'm new to php and am attempting to build a site where the navigation and content is built with query functions. My current tables in my database are Categories, Products, and Variation. So a person chooses a category -> then a product -> then a product page shows variations for that product. The problem I am currently having is after when a person selects a section the previous section selected is reset. So lets a person selects a category the product list is shown, but when a person selects a product, the category is no longer selected in the navigation. Or if someone selects product and sees all the variations, if he selects a variation the product ID is reset. I've tried to comb through the internet for some type of solution. I came across concatenating URL encode, but am not sure if this is the correct solution. I tried concatenating one of my urls with Code: [Select] "<a href=\"product_detail.php?cat=" . urlencode($sel_cat["id"]) . '&' . "product=" . urlencode($sel_product['id']) . '&' . "var=" . urlencode($var["id"]) . "\" its a bit of a stab in the dark. My $_GET function is Code: [Select] function find_selected_product() { global $sel_cat; global $sel_product; global $sel_var; if (isset($_GET['cat'])) { $sel_cat = get_cat_by_id($_GET['cat']); } elseif (isset($_GET['product'])) { $sel_cat = NULL; $sel_product = get_product_by_id($_GET['product']); } elseif (isset($_GET['product'])) { $sel_product = get_product_by_id($_GET['product']); $sel_var = get_default_var($sel_product['id']); } elseif (isset($_GET['var'])) { $sel_product = NULL; //test $sel_var = get_variation_by_id($_GET['var']); } else { $sel_cat = NULL; $sel_product = NULL; $sel_var = NULL; } } My navigation code is Code: [Select] function public_navigation($sel_cat, $public = true) { $output = "<td class=\"c1\"><div class=\"sidenav\"><ul>"; $cat_set = get_all_cats($public); while ($cat = mysql_fetch_array($cat_set)) { $output .= "<li>"; if ($cat["id"] == $sel_cat['id']) { $output .= "<a class=\"current\""; } $output .= "<a href=\"index.php?cat=" . urlencode($cat["id"]) . "\">{$cat["cat_name"]}</a></li>"; } $output .= "</ul>"; return $output; } My product is divided into gender and is written like Code: [Select] function cat_content_ladies($sel_cat, $sel_product, $female = true) { $output = "<ul class=\"regions\">"; $cat_set = get_all_cats($female); while ($cat = mysql_fetch_array($cat_set)) { if ($cat["id"] == $sel_cat['id']) { $product_set = get_products_for_female($cat["id"], $female); $output .= "<tr>"; while ($product = mysql_fetch_array($product_set)) { if ($cat["id"] == $sel_cat['id']) { $output .= "<tr>"; $output .= "<div class=\"pre\"><a href=\"product_detail.php?product=" . urlencode($product["id"]) . "\"></li>"; $output .= "<img src=\"{$product["img_src"]}\" height=\"121\" width=\"121\">"; $output .= "<div>{$product["prod_name"]}</a></div>"; } } $output .= "</tr>"; } } return $output; } My variation table is set up in thumb nails and is written in this function Code: [Select] function show_thumb($sel_product, $sel_var, $public = true) { $output = "<ul class=\"subjects\">"; $product_set = get_all_products($public); while ($product = mysql_fetch_array($product_set)) { $output .= "<li"; if ($product["id"] == $sel_product['id']) { $output .= " class=\"selected\""; } //$output .= "><a href=\"product_detail.php?product=" . urlencode($product["id"]) . //"\">{$product["id"]}</a></li>"; if ($product["id"] == $sel_product['id']) { $var_set = get_variations_for_product($product["id"], $public); $output .= "<ul class=\"pages\">"; while ($var = mysql_fetch_array($var_set)) { $output .= "<li"; if ($var["id"] == $sel_var['id']) { $output .= " class=\"selected\""; } $output .= "><a href=\"product_detail.php?var=" . urlencode($var["id"]) . "\">{$var["id"]}</a></li>"; } $output .= "</ul>"; } } $output .= "</ul>"; return $output; } any light on this subject would be greatly appreciated. I have two tables in my MySQL database: 1. user user_id | firstname | lastname | nickname etc. and 2. con (for contribution) con_id | user_id (foreign key) | name | contribution | category etc. Here's how I wanted to solve the problem of assigning the foreign key to the 2nd table (I'm a beginner so bear with me. ) When logging in, I assigned the user_id to the session variable like this: // do the while loop while ($assoc = mysqli_fetch_assoc($rows)) { // assign database COLUMNS to the variables $dbuser_id = $assoc['user_id']; $dbuser_name = $assoc['nickname']; $dbuser_password = $assoc['password']; etc..................... // set a session after login $_SESSION['user'] = $dbuser_name . $dbuser_id; This prints out the user_id just like I wanted to: echo "Your user_id is: " . $_SESSION['user_id'] = $dbuser_id; Gives: Code: [Select] Your user_id is: 35 ... and this is how the assignment of the foreign key looks like WHILE posting the contribution: $user_id = $_SESSION['user'] = $dbuser_id; if (!empty($knuffix_name) && !empty($knuffix_category) && !empty($knuffix_contribution)) { // Write the data into the database $query = sprintf("INSERT INTO con (con_id, user_id, name, contribution, category, contributed_date) VALUES (' ', '$user_id', '%s', '%s', '%s', now())", mysqli_real_escape_string($dbc, $knuffix_name), mysqli_real_escape_string($dbc, $knuffix_contribution), mysqli_real_escape_string($dbc, $knuffix_category)); When I now do a contribution through the input areas, nothing gets inserted into the database and I automatically get logged out. Obviously it's not working as I thought it would and I'd like to know why is that? Notice that if I take the user_id part OUT, it's working again, so the rest of the code must be right then. Another question I have is: Is this common practice to solve this problem of assigning a foreign key, or is there a better way of doing it? |