Convert content with shortcodes to rendered HTML and update post

rendered-content.php

<?php
define( 'PPI_FOR_EXPORT', 1 );
$a = get_pages();
foreach( $a as $b ) {
	$f = $b->ID;
	$c = get_post_field( 'post_content', $f );
	remove_filter('the_content', 'wpautop');
	$d = apply_filters( 'the_content', $c );
	
	$my_post = array(
		'ID'           => $f,
		'post_content' => $d,
	);


	$e = wp_update_post( $my_post );
	
	if ( $e == 0 ) {
		echo "<strong>Error updating post $f<br><strong>";
	} else {
		echo "Successfully updated post $f<br>";
	}
	
}