$a = $_REQUEST['label'];
Now how can i recognize whether the value stored in variable $a was from $_GET or from $_POST? I wanted to redirect user if it was collected from $_GET. Is there any way to check ? PHP is little tough. Just something like this:
$var = recognize($_REQUEST['label']);
if($var == 'GET') { } else { }
Once a variable has been assigned, you won't be able to tell where it came from (usually).
Consider doing something like this, because if you use $_REQUEST it could even come from $_COOKIE!
if (isset($_GET['label'])) {
// do redirect
} elseif (isset($_POST['label'])) {
// do something else
}
Or, if you're passing that variable deep down where you can't tell where it originally came from:
class RequestParameter
{
private $name;
private $value;
private $source;
public function __construct($name)
{
$this->name = $name;
if (isset($_POST[$name])) {
$this->value = $_POST[$name];
$this->source = INPUT_POST;
} elseif (isset($_GET[$name])) {
$this->value = $_GET[$name];
$this->source = INPUT_GET;
}
}
public function isFromGet()
{
return $this->source === INPUT_GET;
}
public function getValue()
{
return $this->value;
}
}
$a = new RequestParameter('label');
if ($a->isFromGet()) {
// do redircet
}
But I would suggest structuring your code in a way that this is not necessary. One way is to check whether a POST was made:
$_SERVER['REQUEST_METHOD'] === 'POST'
Check for if($_GET['label']) { then redirect using header location; }
Better use $_SERVER['REQUEST_METHOD']:
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
// …
}
more details see documentation PHP
try this
if(isset($_REQUEST['label'])){
//redirect
}
Related
Say I have to similar function :
public function auth(){
return $someResponse;
}
public function collect(){
return $someOtherResponse
}
Question : When one of the response get passed to another class, is there any way to check which function returned the response ?
In a purely object-oriented way, wanting to attach information to a value is akin to wrapping it into a container possessing context information, such as:
class ValueWithContext {
private $value;
private $context;
public function __construct($value, $context) {
$this->value = $value;
$this->context = $context;
}
public value() {
return $this->value;
}
public context() {
return $this->context;
}
}
You can use it like this:
function auth()
{
return new ValueWithContext($someresponse, "auth");
}
function collect()
{
return new ValueWithContext($someotherrpesonse, "collect");
}
This forces you to be explicit about the context attached to the value, which has the benefit of protecting you from accidental renamings of the functions themselves.
As per my comment, using arrays in the return will give you a viable solution to this.
It will allow a way to see what has been done;
function auth()
{
return (array("auth" => $someresponse));
}
function collect()
{
return (array("collect" => $someotherrpesonse));
}
class myClass
{
function doSomething($type)
{
if (function_exists($type))
{
$result = $type();
if (isset($result['auth']))
{
// Auth Used
$auth_result = $result['auth'];
}
else if (isset($result['collect']))
{
// Collect used
$collect_result = $result['collect'];
}
}
}
}
It can also give you a way to fail by having a return array("fail" => "fail reason")
As comments say also, you can just check based on function name;
class myClass
{
function doSomething($type)
{
switch ($type)
{
case "auth" :
{
$result = auth();
break;
}
case "collect" :
{
$result = collect();
break;
}
default :
{
// Some error occurred?
}
}
}
}
Either way works and is perfectly valid!
Letting the two user defined functions auth() & collect() call a common function which makes a call to debug_backtrace() function should do the trick.
function setBackTrace(){
$backTraceData = debug_backtrace();
$traceObject = array_reduce($backTraceData, function ($str, $val2) {
if (trim($str) === "") {
return $val2['function'];
}
return $str . " -> " . $val2['function'];
});
return $traceObject;
}
function getfunctionDo1(){
return setBackTrace();
}
function getfunctionDo2(){
return setBackTrace();
}
class DoSomething {
static function callfunctionTodo($type){
return (($type === 1) ? getfunctionDo1() : getfunctionDo2());
}
}
echo DoSomething::callfunctionTodo(1);
echo "<br/>";
echo DoSomething::callfunctionTodo(2);
/*Output
setBackTrace -> getfunctionDo1 -> callfunctionTodo
setBackTrace -> getfunctionDo2 -> callfunctionTodo
*/
The above function would output the which function returned the response
I need opinion about using session with php. I'm useing session to store data. For instance - configuration:
First I'm loading data from config.ini to $_SESSION['config']
Then I'm using custom session class to get specific data from $_SESSION['config'][$key];
This is config function:
public static function load_config($process_sections = FALSE)
{
$array = parse_ini_file(CONFIG . DS . 'config.ini', $process_sections);
if ($array)
{
$_SESSION['configuration'] = $array;
return TRUE;
}
else
{
$_SESSION['configuration'] = array();
return FALSE;
}
}
function config($key, $default = NULL)
{
if (isset($_SESSION['configuration']))
{
if (isset($_SESSION['configuration'][$key]))
{
return $_SESSION['configuration'][$key];
}
else
{
return $default;
}
}
}
That same is with user object. I'm getting user data not from DB, but API, and storing it in $_SESSION['user']. When user object is constructs, I'm attributing all properties just from $_SESSION['user'][...], for instance:
public function __construct()
{
parent::__construct();
$this->initUser();
}
private function initUser()
{
if (Session::is('user'))
{
return $this->setUserData(Session::get('user'));
}
else
{
return FALSE;
}
}
private function setUserData($data)
{
foreach ($data as $key => $value)
{
if(property_exists($this->_name, $key))
{
$this->{$key} = $value;
}
}
return TRUE;
}
Properties are defined in class. I'm doing it just on time, when object is constructing. Is that right practice? It's working very good for me but I doubt if my method overolads server.
Working on a project of translating website and I had chose this solution
.
I'm trying to accomplish something like :
$VAR1 = $translate->__('Word_To_Translate');
This, not works for me since, the result is directly shown in stdout of the webpage. Even so when trying to call $VAR1 no result is returned.
This is not easily possible with the class you've mentioned.
If you wish to edit the class so it'll return the value instead of echoing it, you can edit class.translation.php, replace the two occurances of echo $str; with return $str;, and replace echo $this->lang[$this->language][$str]; with return $this->lang[$this->language][$str] (simply changing echo to return on both instances).
//$VAR1 delegating
$VAR1 = $translate->__('Word_To_Translate');
//class.translation.php
`class Translator {
private $language = 'en';
private $lang = array();
public function __construct($language){
$this->language = $language;
}
private function findString($str) {
if (array_key_exists($str, $this->lang[$this->language])) {
return $this->lang[$this->language][$str];
return;
}
return $str;
}
private function splitStrings($str) {
return explode('=',trim($str));
}
public function __($str) {
if (!array_key_exists($this->language, $this->lang)) {
if (file_exists($this->language.'.txt')) {
$strings = array_map(array($this,'splitStrings'),file($this->language.'.txt'));
foreach ($strings as $k => $v) {
$this->lang[$this->language][$v[0]] = $v[1];
}
return $this->findString($str);
}
else {
return $str;
}
}
else {
return $this->findString($str);
}
}
}`
Switched the echo for a return
Thank you very much uri2x && Rizier123.
For the moment looks that it is working solution.
Best wishes !
I'm wondering if it's possible, and in case it is, how shoud I achive that:
$this->id <-- i have such thing. but to make it more usable i'd like to have $this->(and here to change the values)
for ex: I might have $this->id $this->allID $this->proj_id
how can I make so that actually I have $this->($myvariable here, that has a unique name in it)?
You can simply use this:
$variable = 'id';
if ( isset ( $this->{$variable} ) )
{
echo $this->{$variable};
}
Here is the solution : http://www.php.net/manual/en/language.oop5.overloading.php#language.oop5.overloading.members
An example of using it is here :
class myClass {
/** Location for overloaded data. */
private $myProperties = array();
public function __set($name, $value)
{
$this->myProperties[$name] = $value;
}
public function __get($name)
{
if (array_key_exists($name, $this->myProperties))
{
return $this->data[$name];
}
}
}
You should check out the variable variables manual on the PHP site.
With that, it could look like:
<?php
echo ${'this->'.$yourvariable};
?>
I prefer to use call_user_func and pass the parameters as array instead.
public function dynamicGetterExample()
{
$property = 'name'; // as an example...
$getter = 'get'.ucfirst($property);
$value = call_user_func(array($this,$getter));
if (empty($value)) {
throw new \Exception('Required value is empty for property '.$property);
}
return $value;
}
Can anyone please explain to me why the following code does not set the values on the array as expected? $_SESSION['foo'] stays empty, even after assigning time() and rand(). I've checked, the __get accessor method is actually called when assigning the variables but they aren't stored for one reason or another.
$test = Session::getSession('test');
$test->foo = array();
$test->foo[] = time();
$test->foo['baz'] = rand(1,9);
var_dump($_SESSION);
Using this simple Session wrapper
class Session
{
protected $namespace = null;
public static function getSession($namespace)
{
return new Session($namespace);
}
public static function destroySession($namespace)
{
if(isset($_SESSION[$namespace])) {
unset($_SESSION[$namespace]);
return true;
}
return false;
}
private function __construct($namespace)
{
$this->namespace = $namespace;
if(!isset($_SESSION[$namespace])) {
$_SESSION[$namespace] = null;
}
}
public function &__get($name)
{
return (isset($_SESSION[$this->namespace][$name])) ? $_SESSION[$this->namespace][$name] : null;
}
public function __set($name, $value)
{
$_SESSION[$this->namespace][$name] = $value;
}
}
In case it might be relevant, i'm using php 5.3.6
I 'm not sure if this can be made to work at all.
For one, to return by reference you should add the & operator at the call site as well. I 'm not sure how that might be possible without screwing up the nice syntax you 're trying to achieve.
Also, you cannot return expressions by reference (only variables). So this won't work:
public function &__get($name)
{
return (isset($_SESSION[$this->namespace][$name]))
? $_SESSION[$this->namespace][$name]
: null;
}
At the very least it should be written as
public function &__get($name)
{
$value = isset($_SESSION[$this->namespace][$name])
? $_SESSION[$this->namespace][$name]
: null;
return $value;
}