PHP 8.4: Implicitly nullable parameter declarations deprecated

include/email.php

@@ -30,7 +30,7 @@ function is_valid_email(string $email)
 //
 // Check if $email is banned
 //
-function is_banned_email(string $email, int $id = null)
+function is_banned_email(string $email, ?int $id = null)
 {
 	global $pun_bans;
 
@@ -79,7 +79,7 @@ function encode_mail_text(string $str)
 //
 // Make a post email safe
 //
-function bbcode2email(string $text, int $wrap_length = 72, string $language = null)
+function bbcode2email(string $text, int $wrap_length = 72, ?string $language = null)
 {
 	static $base_url;
 	static $wrotes = array();

include/functions.php

@@ -458,7 +458,7 @@ function check_bans()
 //
 // Check username
 //
-function check_username(string $username, int $exclude_id = null)
+function check_username(string $username, ?int $exclude_id = null)
 {
 	global $db, $pun_config, $errors, $lang_prof_reg, $lang_register, $lang_common;
 
@@ -638,7 +638,7 @@ function generate_avatar_markup(int $user_id)
 //
 // Generate browser's title
 //
-function generate_page_title($page_title, int $p = null)
+function generate_page_title($page_title, ?int $p = null)
 {
 	global $lang_common;
 
@@ -1034,7 +1034,7 @@ function paginate(int $num_pages, int $cur_page, string $link)
 //
 // Display a message
 //
-function message(string $message, bool $no_back_link = false, string $http_status = null)
+function message(string $message, bool $no_back_link = false, ?string $http_status = null)
 {
 	global $db, $lang_common, $pun_config, $pun_start, $tpl_main, $pun_user, $page_js;
 
@@ -1344,7 +1344,7 @@ function pun_linebreaks(string $str)
 //
 // A wrapper for utf8_trim for compatibility
 //
-function pun_trim($str, string $charlist = null)
+function pun_trim($str, ?string $charlist = null)
 {
 	if (! is_scalar($str)) {
 		$str = '';
@@ -1649,7 +1649,7 @@ function redirect(string $destination_url, string $message)
 //
 // Display a simple error message
 //
-function error(string $message, string $file = null, $line = null, $db_error = false)
+function error(string $message, ?string $file = null, $line = null, $db_error = false)
 {
 	global $pun_config, $lang_common;
 

include/parser.php

@@ -738,7 +738,7 @@ function handle_img_tag(string $url, bool $is_signature = false, ?string $alt =
 //
 // Email bbcode replace to <a href="mailto:... - Visman
 //
-function handle_email_tag(string $mail, string $body = null)
+function handle_email_tag(string $mail, ?string $body = null)
 {
 	if (null === $body)
 		$body = $mail;

include/search_idx.php

@@ -242,7 +242,7 @@ function strip_bbcode(string $text)
 //
 // Updates the search index with the contents of $post_id (and $subject)
 //
-function update_search_index(string $mode, int $post_id, string $message, string $subject = null)
+function update_search_index(string $mode, int $post_id, string $message, ?string $subject = null)
 {
 	global $db_type, $db;
 

include/upload.php

@@ -377,7 +377,7 @@ public function setImageQuality($quality)
     protected $fileIsUp;
     protected $image;
 
-    public function loadFile(string $path, string $basename = null)
+    public function loadFile(string $path, ?string $basename = null)
     {
         $this->filePath = null;
         $this->fileName = null;
@@ -778,7 +778,7 @@ public function __destruct()
         $this->destroyImage();
     }
 
-    protected function hidePath(string $str, string $path = null)
+    protected function hidePath(string $str, ?string $path = null)
     {
         $search = [];
         if (null !== $this->filePath) {

upfiles.php

@@ -27,7 +27,7 @@ function upf_get_pg(string $key, $default = null)
 	return $_POST[$key] ?? ($_GET[$key] ?? $default);
 }
 
-function upf_message(string $message, bool $no_back_link = false, string $http_status = null)
+function upf_message(string $message, bool $no_back_link = false, ?string $http_status = null)
 {
 	global $upf_ajax;