add_action functions.php code example

Example 1: action_page.php

<form method="GET">
  <input type="text" name="someName">
  //The Name Attribute will be put into the _GET inside of php 
  <input type="submit" value="Submit">
 </form>
  
<?php
$var = $_GET("TestUser1");
echo ($var);
?>

Example 2: wp add_action

add_action('wp_footer', function($arguments) use ($myvar) { 
    echo $myvar;
}, $priority_integer, $accepted_arguments_integer);

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