str_replace met PHP code

<?php
$text = 'Dit is de gebruikers lijst: {user_list}';
$search = '{user_list}';
$replace = '<?php include(\'user_list.php\'); ?>';

$content = str_replace($search, $replace, $text);
?>

<?php
$text = 'Dit is de gebruikers lijst: {user_list}';
$search = '{user_list}';
$replace = '<?php include(\'user_list.php\'); ?>';
 
$content = str_replace($search, $replace, $text);
?>

$content = file_get_contents("user_list.php");

$content = file_get_contents("user_list.php");

$text= preg_replace ("_\{userlist\}_se", "include('user_list.php');", $text);

$text= preg_replace ("_\{userlist\}_se", "include('user_list.php');", $text);

<?php
$content = preg_replace ("_\{photo_album_list\}_se","include('content/photo_album_list.php');",$arr['content_text']);
echo $content;
?>

<?php
$content = preg_replace ("_\{photo_album_list\}_se","include('content/photo_album_list.php');",$arr['content_text']);
echo $content;
?>

<?php
$content = preg_replace ("#\{photo_album_list\}#se","include('content/photo_album_list.php');",$arr['content_text']);
echo $content;
?>

<?php
$content = preg_replace ("#\{photo_album_list\}#se","include('content/photo_album_list.php');",$arr['content_text']);
echo $content;
?>

$content = preg_replace ("_\{photo\_album\_list\}_se","include('content/photo_album_list.php');",$arr['content_text']);

$content = preg_replace ("_\{photo\_album\_list\}_se","include('content/photo_album_list.php');",$arr['content_text']);