How can I embed HTML within PHP conditional statements to control element visibility based on user interaction?

Embedding HTML Within PHP Conditional Statements

It's possible to embed HTML within PHP "if" statements, but it's important to understand the execution order. PHP code is executed before any HTML on the page, so HTML placed within an "if" statement will only be displayed if the condition is met.

Let's consider an example where you want to access a database table and display its contents based on a user's selection from an HTML pulldown menu. You can use the following approach:

<?php
if (isset($_POST['submit'])) {
?>
<!-- HTML code for pulldown menu and form elements -->
<?php
}
?>

The PHP code sets up the if statement around the HTML form and only executes it if the submit button has been clicked (i.e., when the condition is met).

To further enhance your search functionality, you can add another HTML pulldown and radio buttons within the if statement. Use the following syntax:

<?php
if (isset($_POST['submit'])) :
?>
<!-- HTML code for search elements (pulldown and radio buttons) -->
<?php
endif;
?>

This ensures that the search elements will only be displayed if the submit button has been clicked, allowing users to modify the table based on their selections.

Here's an example demonstrating the above approach:

<?php
if (isset($_POST['submit'])) :
?>
<label>Select a column:</label>
<select name="column">
  <option value="id">ID</option>
  <option value="name">Name</option>
</select>

<label>Action:</label>
<label><input type="radio" name="action" value="update"> Update</label>
<label><input type="radio" name="action" value="delete"> Delete</label>
<?php
endif;
?>

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