You are simply the best of I have ever watched tutorials of wordpress development and eagerly wait and check when your next video will be uploaded :) Carry on man :)
Great videos with good Wordpress and PHP info. Thanks for sharing these. Just one correction. I'm sure it's because English is not your native language, but when you create an instance of a class, it is not called "initialization" as you refer to it. It is called "instantiation". There is a difference and I don't want viewers to get confused. Keep it up!
Thank you so much for the clarification, I pinned this comment at the top so other users will see it first. "instantiation", I learned something new today 😄
Ever since you remove the SecondClass at 0:49, your custom post type 'Books' doesn't get created anymore. It never appears back in the menu upon activation of you plugin during this lesson. However, in the following lessons it does appear. Where in your toturial do you restate the call upon *add_action('init', array($this, 'custom_post_type');* which is currently hiding in the uncalled *function create_post_type()* ?
not sure but I think you want to make sure that the function custom_post_type() is called within the activate function function activate() { // generate CPT $this -> custom_post_type(); require_once plugin_dir_path( __FILE__ ) . 'inc/lwdsplugin-activate.php'; // flush rewrite rules flush_rewrite_rules(); } don't quote me on that though. I'm still learning some of the stuff. hahahaha
If you encounter problems with concatenating plugin_dir_path with the subsequent path- and filenames due to different usage of / and \ under windows, try this: $path = untrailingslashit(plugin_dir_path(__FILE__)); require_once join(DIRECTORY_SEPARATOR, array($path, 'inc', 'cvr-tutorial-plugin-activate.php'));
Thanks for this. Many others complained about this little digression into OOP, but I find it necessary in order to continue the work on plugins and fully understand their structure. Happy Coding!
Hey Alessandro and Viewers, in a previous comment I already showed a way to use the hooks without an array. I know that this video came out earlier then my comment, but I want to point at it in a directer way. What I showed you was the usage inside the constructor, but it also works outside a class. You also can use the static method of a class. register_activation_hook(__FILE__, $alecadddPlugin->activate); register_activation_hook(__FILE__, AlecadddPluginActivate::activate); Notice that I used the function without (). When you use the () the function would be called and what ever returns will be injected into the register hook. But without () you'll refer to the function directly and that is what the register hook actually needs to call the function. Sure. The method provides a way to use an array but he will then use some magic functions from PHP (yes there a called magic functions) and that would always be slower then to call a function directly. But as always: Use the way you personally prefer. Greetings BlankWolf
Sorry for the lack of answer, I totally missed this comment. I tried your suggestions and I got errors in both cases. register_activation_hook(__FILE__, $alecadddPlugin->activate); returns Notice: Undefined property: AlecadddPlugin::$activate register_activation_hook(__FILE__, AlecadddPluginActivate::activate); returns Fatal error: Uncaught Error: Undefined class constant 'activate'
Yes, it is. Due to the peculiar structure of a plugin, WordPress recommends to use OOP to avoid conflicts with other plugins and theme options. Don't worry tho, if you keep watching my videos, you will grasp the basic concepts of OOP and you'll learn how to build anything.
hi alessandro how you doin. i would really appreciate if you make a plugin with max possible add_filter hook used to change things, like in some cases woocommerce or may things which are hard to look out and possibly we can use filter to reset according to our wish..basically understanding the hook properly
Thanks great video. I do not know if this is a PHP thing, but it feels strange to see a function "activate" being invoked from another function called "activate".
Hi, thank you so much by the tutorials. Is it not neccesary include if(!defined( 'ABSPATH' )) { die; } in AlecadddPluginActivate and AlecadddPluginDeactivate? Thanks in advance
When calling the activation hook outside of the class, i am getting a headers already sent of 260 characters ): However, by wrapping the requiring and invocation of the activate method inside of the plugin's class, as you explained: class CutiePlugin { public function register() { add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_scripts' ] ); } public function activate() { require_once plugin_dir_path( __FILE__ ) . 'inc/cutie-plugin-activate.php'; $this->custom_post_type(); CutiePluginActivate::activate(); } public function deactivate() { require_once plugin_dir_path( __FILE__ ) . 'inc/cutie-plugin-deactivate.php'; CutiePluginDeactivate::deactivate(); } } It does work properly!
will there be tutorial for theme option like adding phone number, emails, logo etc, i have one but thats in php 5 which obviously doesn't wok with php 7, so need theme option that work with php 7
Alessandro Castellani hi and tnx for all u have made for us! Is amazing this series and all stuff that u posted! I have a question for u... In my case the hook for activate the code is not working, for some reason all stuff inside the method that is called by the register_activation_hook don't work... I seek along the net by the answer without success... Do u know why is this happening!? Is something I overpasses?
I am getting "The plugin generated 228 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin." after the changes. I went to git repo and compared my code and still no go . i copied all the code from the repo and just changed filenames and still get error. any ideas?
Just realized the method [custom_post_type] / [create_post_type] was purposely not called in this video, double checked the results in the end that there is no [Book] link.
Hi Alessandro. i got this ...but am sure i can fix it. _func_array() expects parameter 1 to be a valid callback, non-static method ::enqueue() should not be called statically class-wp-hook.php on line 286
its really going to be too much lenthy due to oop cource in between, make another oop cource playlist instead. Show how to make plugin fully...........
As I said in the previous video, I need to do a quick overview about OOP in order to continue the series. Fully understanding the basics of OOP is absolutely necessary to build a good plugin, and furthermore, follow along and understand this series.
You should be more confident in your coding if you're going to be making these videos, it almost felt like you were trying to convince me to stop watching them lol
As I said in the previous video, I need to do a quick overview about OOP in order to continue the series. Fully understanding the basics of OOP is absolutely necessary to build a good plugin, and furthermore, follow along and understand this series.
Great series - thanks for doing it. In my opinion add whatever you like to make everything make good sense, its better to over explain rather than going too fast and letting some people fall behind. BTW uninstall is pronounced un-install and not uni-stall... lol - just poking a little fun... Looking forward to the next installment!
A much cleaner approach is using spl_autoload_register and writing a little code for autoloading plugin files. Better to have at least a namespace for the plugin to avoid class naming collisions. spl_autoload_register(function ($className) { $prefix = 'Castellani1\\'; if (substr($className, 0, strlen($prefix)) !== $prefix) return; $classNameWithoutPrefix = substr($className, strlen($prefix)); $fileNameWithoutPrefix = str_replace('\\', DIRECTORY_SEPARATOR, $classNameWithoutPrefix).'.php'; $fileName = plugin_dir_path( __FILE__ ) . DIRECTORY_SEPARATOR . 'src' . DIRECTORY_SEPARATOR . $fileNameWithoutPrefix; require_once($fileName); });
I have been a developer for more than 5 years , havent seen any tutorials better than these.
Thanks so much
what you build ? building blocks ?/
😂
You are simply the best of I have ever watched tutorials of wordpress development and eagerly wait and check when your next video will be uploaded :) Carry on man :)
Thank you so much man, I really appreciate it.
You can activate the notifications to never miss a video.
Cheers
Thanks man, I turned it on :)
man
Great videos with good Wordpress and PHP info. Thanks for sharing these. Just one correction. I'm sure it's because English is not your native language, but when you create an instance of a class, it is not called "initialization" as you refer to it. It is called "instantiation". There is a difference and I don't want viewers to get confused. Keep it up!
Thank you so much for the clarification, I pinned this comment at the top so other users will see it first.
"instantiation", I learned something new today 😄
Ever since you remove the SecondClass at 0:49, your custom post type 'Books' doesn't get created anymore. It never appears back in the menu upon activation of you plugin during this lesson. However, in the following lessons it does appear. Where in your toturial do you restate the call upon *add_action('init', array($this, 'custom_post_type');* which is currently hiding in the uncalled *function create_post_type()* ?
I also lost 2 hours because of this problem :-(
not sure but I think you want to make sure that the function custom_post_type() is called within the activate function
function activate() {
// generate CPT
$this -> custom_post_type();
require_once plugin_dir_path( __FILE__ ) . 'inc/lwdsplugin-activate.php';
// flush rewrite rules
flush_rewrite_rules();
}
don't quote me on that though. I'm still learning some of the stuff. hahahaha
Just add this constructor again:
function __construct() {
$this->create_post_type();
}
you are one of my best teacher that i had.
Thank you so much :D
Thank you for the amazing tutorial. Waiting for series to continue!
+Ilya Nice thanks for watching! I'm working a lot on an app and it's sucking all my free time. I should be able to publish a new video soon
Feeling Great!! Learning really interestingly.
Skills growing bit by bit.
Thank you.
Thank you for this amazing tutorial. It's so valuable.
Thanks man! your tutorials are the best! I can't wait for the next one!!!
Thank you so much. I should be able to get back with this series from next week, sorry for the long wait.
Thank you Alessandro. The Best tutorial.
If you encounter problems with concatenating plugin_dir_path with the subsequent path- and filenames due to different usage of / and \ under windows, try this:
$path = untrailingslashit(plugin_dir_path(__FILE__));
require_once join(DIRECTORY_SEPARATOR, array($path, 'inc', 'cvr-tutorial-plugin-activate.php'));
Apparently plugin_dir_name() is a wrapper for trailingslashit( dirname( $file ) );. So we can just use dirname(__FILE__) as well
Hi, thank you for showing how will oop work in the plugin, otherwise I would be lost in future parts of this tutorial... good job
Thanks for this. Many others complained about this little digression into OOP, but I find it necessary in order to continue the work on plugins and fully understand their structure.
Happy Coding!
You are great! Great tutorial! I saw more of your video and I learn more. Can i say what font you use in your editor? I like it.
Thanks for watching, I'm glad you like my tutorials.
I'm using Fira Code.
Really your a great teacher.
Hey Alessandro and Viewers,
in a previous comment I already showed a way to use the hooks without an array. I know that this video came out earlier then my comment, but I want to point at it in a directer way.
What I showed you was the usage inside the constructor, but it also works outside a class. You also can use the static method of a class.
register_activation_hook(__FILE__, $alecadddPlugin->activate);
register_activation_hook(__FILE__, AlecadddPluginActivate::activate);
Notice that I used the function without ().
When you use the () the function would be called and what ever returns will be injected into the register hook. But without () you'll refer to the function directly and that is what the register hook actually needs to call the function.
Sure. The method provides a way to use an array but he will then use some magic functions from PHP (yes there a called magic functions) and that would always be slower then to call a function directly.
But as always: Use the way you personally prefer.
Greetings BlankWolf
Sorry for the lack of answer, I totally missed this comment.
I tried your suggestions and I got errors in both cases.
register_activation_hook(__FILE__, $alecadddPlugin->activate); returns
Notice: Undefined property: AlecadddPlugin::$activate
register_activation_hook(__FILE__, AlecadddPluginActivate::activate); returns
Fatal error: Uncaught Error: Undefined class constant 'activate'
You're right ... I mixed that up with js ... :O
its super explain about oops and step into plugin development its more helpful for my career
Really happy to hear that, thank you so much :D
Good stuff man!
But I dont understand why that header not sent error comes and how to get rid of it???
Thank you for your good work! Keep it up :)
Great tutorial like always...Please, is it necessary to write WP plugins in OOP, or does wp codex alow plugins without OOP? Thanks..
Yes, it is. Due to the peculiar structure of a plugin, WordPress recommends to use OOP to avoid conflicts with other plugins and theme options.
Don't worry tho, if you keep watching my videos, you will grasp the basic concepts of OOP and you'll learn how to build anything.
Gd tutorials man. Like u and ur tutorials also
Hi, we are eagerly waiting for your next video of this series ):
I should be able to get back with this series from next week, sorry for the long wait.
hi alessandro how you doin. i would really appreciate if you make a plugin with max possible add_filter hook used to change things, like in some cases woocommerce or may things which are hard to look out and possibly we can use filter to reset according to our wish..basically understanding the hook properly
Thanks great video. I do not know if this is a PHP thing, but it feels strange to see a function "activate" being invoked from another function called "activate".
Nice tutorials thank you.
You're welcome
great tutorial:)
Thanks
really helpfull tutorial!!
Allessandro, are you willing to teach how to create a plugin like VideoWhisper? That would be great. :)
Hi waiting for the next videos master
Yeah, you're right. Sorry for the delay, it's a pretty busy period and I'm trying to record new video this week.
Thanks for your patience.
Really Helpful! BIg Thanks.
Hi, thank you so much by the tutorials. Is it not neccesary include
if(!defined( 'ABSPATH' )) {
die;
}
in AlecadddPluginActivate and AlecadddPluginDeactivate?
Thanks in advance
Non è necessario includere quel codice in ogni file del plugin, solo nel file principale che contiene i dati del plugin e l'esecuzione principale.
Can you use 'self ' to call static method inside a class? I mean just substituting $this with self
15:29 The custom post type stopped worked working
This part is just an intro showing different approaches and methods. You're gonna start coding the rela plugin later in few videos.
When calling the activation hook outside of the class, i am getting a headers already sent of 260 characters ):
However, by wrapping the requiring and invocation of the activate method inside of the plugin's class, as you explained:
class CutiePlugin
{
public function register()
{
add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_scripts' ] );
}
public function activate()
{
require_once plugin_dir_path( __FILE__ ) . 'inc/cutie-plugin-activate.php';
$this->custom_post_type();
CutiePluginActivate::activate();
}
public function deactivate()
{
require_once plugin_dir_path( __FILE__ ) . 'inc/cutie-plugin-deactivate.php';
CutiePluginDeactivate::deactivate();
}
}
It does work properly!
will there be tutorial for theme option like adding phone number, emails, logo etc, i have one but thats in php 5 which obviously doesn't wok with php 7, so need theme option that work with php 7
Did you check my Premium Theme Development series?
I tackle everything you listed
Is this tutorial series completed thanks
No is not, I'm releasing a new video later today.
Cheers
Merci Beaucoup !
Cheers
Hay, Keep it up!
Alessandro Castellani >>>>>> great , great & great
Thank you so much :D
Alessandro Castellani hi and tnx for all u have made for us! Is amazing this series and all stuff that u posted!
I have a question for u... In my case the hook for activate the code is not working, for some reason all stuff inside the method that is called by the register_activation_hook don't work... I seek along the net by the answer without success... Do u know why is this happening!? Is something I overpasses?
By the way, start from PHP 8, calling non-static function statically is not allowed anymore.
post_type 'books' is disappeared! :D
This started to happen in video #7
I am getting "The plugin generated 228 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin." after the changes. I went to git repo and compared my code and still no go . i copied all the code from the repo and just changed filenames and still get error. any ideas?
Nevermind, spelling error fixed :)
Cheers
Okaaay.. Got quite confused, was wondering why the [$this->custom_post_type();] line of code doesn't go to activate method on the other file.
What do you mean by "the other file"?
In the video, I'm calling that method in the parent extended class.
Just realized the method [custom_post_type] / [create_post_type] was purposely not called in this video, double checked the results in the end that there is no [Book] link.
Hi Alessandro. i got this ...but am sure i can fix it. _func_array() expects parameter 1 to be a valid callback, non-static method ::enqueue() should not be called statically
class-wp-hook.php on line 286
Foud the problem. i forgot to add action in function register method
I'm glad you solved it
best one
another tut :D
And many more to come :D
I know that ........ :D ...
do you planing to do jQuery tuts and also javascript , php, mysql ???
Thanks in advance :D
Yes to all of that :D
cant wait to see these tutorial .
Please add a Bitcoin address on support page. Thank you!
Thanks at least I understand my issues.
Why are you showing stuff and then erasing it? This is super confusing!
I did it to show different approaches and teach the how and why behind specific decisions.
WHY ARE YOU KEEP SAYING “METHOD” TO THE FUNCTIONS? NO GOOD. :)
its really going to be too much lenthy due to oop cource in between, make another oop cource playlist instead. Show how to make plugin fully...........
No its fault he is going in correct way its so helpful
I know but for good developer who not know wp plugin development then for them its more lenthy
No he trying to make beginners also to become a good developer
What i said in main comment... to make another playlist for oop cource. not to involve everything at same cource. I'm not saying to remove this...
As I said in the previous video, I need to do a quick overview about OOP in order to continue the series. Fully understanding the basics of OOP is absolutely necessary to build a good plugin, and furthermore, follow along and understand this series.
You should be more confident in your coding if you're going to be making these videos, it almost felt like you were trying to convince me to stop watching them lol
What do you mean?
It's turning into a OOP tutorial rather than a Wordpress Plugin tutorial, get back to concentrating on creating the plugin...
As I said in the previous video, I need to do a quick overview about OOP in order to continue the series. Fully understanding the basics of OOP is absolutely necessary to build a good plugin, and furthermore, follow along and understand this series.
Great series - thanks for doing it. In my opinion add whatever you like to make everything make good sense, its better to over explain rather than going too fast and letting some people fall behind.
BTW uninstall is pronounced un-install and not uni-stall... lol - just poking a little fun... Looking forward to the next installment!
Thank you so much. And thank for the pronunciation tip, I'm still learning :P
A much cleaner approach is using spl_autoload_register and writing a little code for autoloading plugin files. Better to have at least a namespace for the plugin to avoid class naming collisions.
spl_autoload_register(function ($className) {
$prefix = 'Castellani1\\';
if (substr($className, 0, strlen($prefix)) !== $prefix)
return;
$classNameWithoutPrefix = substr($className, strlen($prefix));
$fileNameWithoutPrefix = str_replace('\\', DIRECTORY_SEPARATOR, $classNameWithoutPrefix).'.php';
$fileName = plugin_dir_path( __FILE__ ) . DIRECTORY_SEPARATOR . 'src' . DIRECTORY_SEPARATOR . $fileNameWithoutPrefix;
require_once($fileName);
});