known issue 4.7.10 IN_DEV error with PHP 8.1

[Adriano Faria]

When I set the board on IN_DEV mode, I got the following error in any form (new plugin, a new app, profile fields, etc.), ACP and frontend.

C:\wamp64\www\47x\system\Helpers\Form\FormAbstract.php:312:
object(Whoops\Exception\ErrorException)[225]
  protected 'message' => string 'htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated' (length=87)
  private string 'string' (Exception) => string '' (length=0)
  protected 'code' => int 8192
  protected string 'file' => string 'C:\Windows\Temp\theBB1A.tmp' (length=27)
  protected int 'line' => int 111
  private array 'trace' (Exception) => 
    array (size=13)
      0 => 
        array (size=4)
          'function' => string 'handleError' (length=11)
          'class' => string 'Whoops\Run' (length=10)
          'type' => string '->' (length=2)
          'args' => 
            array (size=4)
              ...
      1 => 
        array (size=4)
          'file' => string 'C:\Windows\Temp\theBB1A.tmp' (length=27)
          'line' => int 111
          'function' => string 'htmlspecialchars' (length=16)
          'args' => 
            array (size=4)
              ...
      2 => 
        array (size=4)
          'file' => string 'C:\wamp64\www\47x\system\Theme\Dev\Template.php' (length=47)
          'line' => int 171
          'function' => string 'IPS\Theme\theme_core_global_forms_text' (length=38)
          'args' => 
            array (size=14)
              ...
      3 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\system\Helpers\Form\Text.php' (length=46)
          'line' => int 156
          'function' => string '__call' (length=6)
          'class' => string 'IPS\Theme\Dev\_Template' (length=23)
          'type' => string '->' (length=2)
          'args' => 
            array (size=2)
              ...
      4 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\system\Helpers\Form\FormAbstract.php' (length=54)
          'line' => int 270
          'function' => string 'html' (length=4)
          'class' => string 'IPS\Helpers\Form\_Text' (length=22)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      5 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\system\Helpers\Form\FormAbstract.php' (length=54)
          'line' => int 236
          'function' => string 'rowHtml' (length=7)
          'class' => string 'IPS\Helpers\Form\_FormAbstract' (length=30)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      6 => 
        array (size=6)
          'file' => string 'C:\Windows\Temp\theBB0A.tmp' (length=27)
          'line' => int 286
          'function' => string '__toString' (length=10)
          'class' => string 'IPS\Helpers\Form\_FormAbstract' (length=30)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      7 => 
        array (size=4)
          'file' => string 'C:\wamp64\www\47x\system\Theme\Dev\Template.php' (length=47)
          'line' => int 171
          'function' => string 'IPS\Theme\theme_forums_front_submit_createTopicForm' (length=51)
          'args' => 
            array (size=14)
              ...
      8 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\system\Helpers\Form\Form.php' (length=46)
          'line' => int 519
          'function' => string '__call' (length=6)
          'class' => string 'IPS\Theme\Dev\_Template' (length=23)
          'type' => string '->' (length=2)
          'args' => 
            array (size=2)
              ...
      9 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\applications\forums\modules\front\forums\forums.php' (length=69)
          'line' => int 653
          'function' => string 'customTemplate' (length=14)
          'class' => string 'IPS\Helpers\_Form' (length=17)
          'type' => string '->' (length=2)
          'args' => 
            array (size=4)
              ...
      10 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\system\Dispatcher\Controller.php' (length=50)
          'line' => int 107
          'function' => string 'add' (length=3)
          'class' => string 'IPS\forums\modules\front\forums\_forums' (length=39)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      11 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\system\Dispatcher\Dispatcher.php' (length=50)
          'line' => int 153
          'function' => string 'execute' (length=7)
          'class' => string 'IPS\Dispatcher\_Controller' (length=26)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      12 => 
        array (size=6)
          'file' => string 'C:\wamp64\www\47x\index.php' (length=27)
          'line' => int 13
          'function' => string 'run' (length=3)
          'class' => string 'IPS\_Dispatcher' (length=15)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
  private ?Throwable 'previous' (Exception) => null
  protected int 'severity' => int 8192
  public 'xdebug_message' => string '<tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Whoops\Exception\ErrorException: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in C:\Windows\Temp\theBB1A.tmp on line <i>111</i></th></tr>
<tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr>
<tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#'... (length=29703)

Fresh install of 4.7.10. Dev files updated.

The error happens with PHP 8.1.18. If I switch to 8.027, got no error.

Thanks.

[Marc Stridgen]

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.