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Help with my first super simple "Hello World" Wordpress plugin


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I am trying to write my first plugin.

 

So I read some tutorials and figured I'd start with a simple plugin to make sure I understood everything I read. I just wanted to echo "Hello World" on the screen. Simple.

 

I created the plugin and saw it in my admin. I activated it. So far, so good. Then... nothing happens. My code is extremely simple. I'm sure someone will look at it and see the problem.

 

I did some more research online and I tried to echo the message several ways:

 

<?php

 

/*

Plugin Name: Hello

*/

 

function hello_world() {

echo "Hello!";

print("Hello World");

}

 

add_action('wp_print_scripts', 'hello_world');

 

add_action('get_header', 'hello_world');

 

add_action('get_footer', 'hello_world');

 

add_action('wp_header', 'hello_world');

 

add_action('wp_footer', 'hello_world');

 

?>

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Hmmm, interesting. I will check on that.

 

I will check the name. I will also check the cache settings on my MAMP server. I cleared my browser cache.

 

Did the message show up on the header and footer?

 

I appreciate the response!

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The code looks like it should work, but your hook choices are a bit off. I know you're just playing around and trying to learn, but the wp_print_scripts hook has been replaced with wp_enqueue_scripts, and the get_footer and get_header hooks aren't mean to be used for output as any output will happen before the markup.

 

While testing, you may be better off using the the_content hook to prepend or append any output to the WP post content. That way you can see it right there in the middle of the page.

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Great, thanks for the help! I had to adjust some settings.

 

 

Thanks for the advice about the wp_print_scripts and the get_footer and get_header. When my plugin didn't work I started throwing everything at the problem just to get my message to show up.

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