A PAD page is a combination of a PHP file and/or HTML file, the home page did already show below example.

PHP HTML Result 
<?php

  $hi = 'Hello World !';

?>
 
<h3>
  {$hi}
</h3>

Hello World !

There are many other ways the application PHP code and the application HTML markup work together.

PHP HTML Result 
<h3>Hello World</h3>

Hello World

 
<h3>Hello World</h3>

Hello World

 
<h3>
  <?php echo 'Hello World'; ?>
</h3>

Hello World

 
<?php

  echo '<h3>Hello World</h3>';

?>

Hello World

Ok ok, above is standard PHP/HTML, existing PHP and HTML web pages can be wrapped in PAD as is. An existing .html file needs no wrapping at all: dropped in the application directory it is a page, a template exactly like a .pad - it pairs with a .php of the same name and PAD tags resolve in it. When both a .pad and an .html exist, the .pad wins.

Below the extra PAD options for merging PHP code and HTML layout.

PHP HTML Result 
<?php

  return '<h3>Hello World</h3>';

?>

Hello World

 
<?php

  $hi = 'Hello World';

?>
 
<h3>{$hi}</h3>

Hello World

 
<?php

  $hi = [
    [ 'hi' => 1 ],
    [ 'hi' => 2 ],
    [ 'hi' => 3 ]
  ];

?>
 
{hi}
  <h3>Hello World {$hi}</h3>
{/hi}

Hello World 1

Hello World 2

Hello World 3

 
<?php

  return [
    88 => [ 'hi' => 1 ],
    12 => [ 'hi' => 2 ],
    33 => [ 'hi' => 3 ]
  ];

?>
 
<h3>Hello World {$hi}</h3>

Hello World 1

Hello World 2

Hello World 3

 
<?php

  return [
    1 => [ 'hi' => 2 ],
    2 => [ 'hi' => 3 ],
    3 => [ 'hi' => 4 ]
  ];

?>
 
<h3>Hello World 1</h3>

@start@
  <h3>Hello World {$hi}</h3>
@end@

<h3>Hello World 5 </h3>

Hello World 1

Hello World 2

Hello World 3

Hello World 4

Hello World 5 

<h3>Hello World 1</h3>

<?php

  $hi = 'Hello World 7';

  echo '<h3>Hello World 2</h3>';

  return [
    88 => [ 'hi' => 4 ],
    12 => [ 'hi' => 5 ],
    33 => [ 'hi' => 6 ]
  ];

?>
 
<h3>Hello World 3</h3>

@start@
  <h3>Hello World {$hi}</h3>
@end@

<h3>{$hi}</h3>

<h3>Hello World 8 </h3>

Hello World 1

Hello World 2

Hello World 3

Hello World 4

Hello World 5

Hello World 6

Hello World 7

Hello World 8 

<?php

  return TRUE;

?>
 
<h3>Hello World - TRUE</h3>

@else@

<h3>Hello World - FALSE</h3>

Hello World - TRUE

 
<?php

  return FALSE;

?>
 
<h3>Hello World - TRUE</h3>

@else@

<h3>Hello World - FALSE</h3>

Hello World - FALSE

 
<?php

  return NULL;

?>
 
<h3>Hello World - TRUE</h3>

@else@

<h3>Hello World - FALSE</h3>
 
<?php

  return [1,2,3];

?>
 
<h3>Hello World - TRUE</h3>

@else@

<h3>Hello World - FALSE</h3>

Hello World - TRUE

Hello World - TRUE

Hello World - TRUE

 
<?php

  return [];

?>
 
<h3>Hello World - TRUE</h3>

@else@

<h3>Hello World - FALSE</h3>

Hello World - FALSE