I need to start an asynchronous method call in PHP but have no idea or clue in how to achieve this. The big idea is as follow:
public myfunctionAction() {
// normal flow
// execute the asynchronous call (WS)
// continue normal flow
}
How I do that? Can any provide a simple example just to use as a start point? It's possible to leave the asynchronous call executing on the background and continue the normal flow?
I'm using Symfony 2.6.x as development framework if that helps a little
1 - You can use curl in php with a low time out
2 - You can use popen to start a batch or script shell without waiting the response : like pclose(popen("ws_start.sh"));
Hope that helps :)
Related
I'm working on something that script need to wait for do childFunc and after that return the result of childFunc and after that, the script continue. Something like async and await in javascript.
<?php
$loginResponse = $system->login($username, $password);
if ($loginResponse !== null && $loginResponse->isTwoFactorRequired()) {
$twoFactorIdentifier = $loginResponse->TwoFactorInfo()->getTwoFactorIdentifier();
// I need to wait here that myChaildFucn LoadView and get data from user and then after some process retuen result!!!!
$verificationCode = myChaildFucn();
$system->checkTwoFactorLogin($username, $password, $twoFactorIdentifier, $verificationCode,);
}
Salaam,
(if you want to speak Persian, I'm okay but I prefer to answer by English to ensure other people who has same your problem can find the solution)
so as you know, PHP is a synchronous engine and we have to use ajax to split our requests or use some functions to simulate Asynchronous performances.
anyway...
we have two options to solve this issue generally:
use sleep function : if you are sure about your delay timing, so just use it and define a delay to stop your app for seconds, otherwise It's not a good idea for your situation.
use foxyntax_ci in https://github.com/LegenD1995/foxyntax_ci : if you have SPA or using REST API, It's your best option!! actually it has some libraries on codeigniter and help you to build your queries, working with files, session, cookies, config authorization and ... with Asynchronous function from javascript. (NOTE: It's Alpha version but it hasn't bugs, just needs to review in media function to improve performance).
I've been trying to make a very simple PHP application using php-gtk. The program does some processing and outputs the status of that process. The problem is that the application doesn't launch until the process is finished.
I read that the line while (Gtk::events_pending()) {Gtk::main_iteration();} allows the main loop to continue while processing but it doesn't work for me.
Here's the code:
<?php
if(!class_exists('gtk')){
exit('php-gtk2!!');
}
$wnd = new GtkWindow();
$wnd->set_size_request(400, 200);
$wnd->set_title('test');
$wnd->connect_simple('destroy', array('gtk', 'main_quit'));
$lbl = new GtkLabel('1/3');
function processing($lbl){
while (Gtk::events_pending()) {Gtk::main_iteration();}
sleep(2);
$lbl->set_text('2/3');
sleep(2);
$lbl->set_text('3/3');
}
processing($lbl);
$wnd->add($lbl);
$wnd->show_all();
Gtk::main();
?>
I tried placing that line everywhere on the code and I'm not sure why it doesn't work.
Any help would be really appreciated. Thank you in advance!
(Note: the sleep function is only to simulate some heavy processing)
Since you are trying to do work at the same time as your GUI is running, you will need to use a second thread, communicating from that thread to the GUI thread to get GUI updates. To do this, use the gdk_threads_add_idle() or g_idle_add() functions. Do not call GTK+ functions directly from the other thread!
I am using Codeigniter for a project and i usually call a series of models (let's say controllerA -> modelA -> modelB -> modelC) for some work. I want the php to stop executing when it reaches some exception where i invoke the exit() command. Now, if the command exit() is invoked in modelB, will it stop execution of only the script of modelB and continue executing rest of the modelA? Or will it stop the entire execution flow.
I really don't know how to put this question here. The question looks quite messy. Please let me know should i need to revise the question itself.
Yes, exit stops all script execution immediately, regardless where you call it.
The opposite is return which only stops execution of the current function (or current file when used at global level in an included file)
Read more here: https://stackoverflow.com/a/9853554/43959
Wherever you call the exit() function, all code will stop executing. This includes the other files because codeigniter just 'requires' them.
It stops the execution from that line.
I'm not sure if what you want, but maybe you can use exceptions to control PHP code execution.
http://es.php.net/manual/en/class.exception.php
Regards!
Like someone mentions above you should return from a function, or If your in a loop you could use continue or break
I'm creating a app that requires me to run a second php script while the first script is still running.
I'm new to php programing so I'm sure there's a simple function I can use that I'm just not aware of.
Looking forward to any help...
Shane
Since you are new to PHP I'm guessing you're looking for the include/require (and include_once/require_once) language constructs which will execute another PHP script as if it is part of the current script.
Otherwise if you want it to run as a separate process look into exec, shell_exec, or backticks. If you need the other PHP script to run as a background process make sure to redirect stdout somewhere (a file or maybe /dev/null if you don't need it) so that your currently executing script doesn't have to wait for it to finish to continue executing.
This will actually require us to use some Javascript for an ajax call to execute our PHP and return it's data.
I prefer Jquery, which will look similar to this:
function callPHP(){
$.post('./filetocall.php', {variableid: 'id'}, function (response) {
$("#div_for_return_data").val(response);
});
}
filetocall.php can look like anything. It's output will populate the #div_for_return_data
eg:
<?php echo $_GET['variableid']; ?>
Then just call the Jquery function from anywhere.
Hi Please help me in executing more than one method at a time in PHP.
Below is example:
<?php
function writeName()
{
sleep(3);
echo "Kai Jim Refsnes";
}
function b(){
sleep(3);
echo"b";
}
b();
writeName());
?>
Here above program take 6 sec to execute.But I want to run my both method simultaneously so that program should execute with in 3 sec(Multi threading).
With common PHP its not possible, because PHP is executed sequential. You may have a look at a job-server like gearman, or you may try to use forks (pcntl_fork()). It's not multi-threading, because there is no shared memory.
Sorry, but multithreading is not supported in PHP.
But you could start a PHP script which can run in the background using exec(). Just make sure you redirect it's output elsewhere.
That should be the closest you can get to "multithreading" without additional tools. Here's what the manual says:
Note: If a program is started with this function, in order for it to continue running in the background, the output of the program must be redirected to a file or another output stream. Failing to do so will cause PHP to hang until the execution of the program ends.