Uninitialized string offset 0 in Str::replaceScopeNameCapture()

[magarrent]

Root cause:

while ($result[0] === '.') {  // ERROR: No length check
    $result = substr($result, 1);
}

Problem: Code accesses $result[0] without checking if string has content, causing errors when processing empty capture groups.

Reproduction:

use Phiki\Phiki;
use Phiki\Theme\Theme;

$phiki = new Phiki();
$code = '@if (ViewData.Model.Count == 0) { <!-- No-data placeholder with \"New Standard +\" button --> } else { <tr> <th>Standard <span class=\"caretDwn\"></span></th> <!-- ... other headers ... --> </tr> @foreach (var standard in Model) { <tr id=\"@standard.Uid\" class=\"@rowClass hand\" ...> <td><a href=\"@navigateScript\">@standard.Title</a></td> <!-- ... other columns ... --> </tr> } } ';
$html = $phiki->codeToHtml($code, 'html', [
                    'light' => Theme::CatppuccinMocha,
                    'dark' => Theme::CatppuccinMocha,
                ])->toString();
// Throws: local.ERROR: Uninitialized string offset 0 {"code":"@if (ViewData.Model.Count == 0) { <!-- No-data placeholder with \\\"New Standard +\\\" button --> } else { <tr> <th>Standard <span class=\\\"caretDwn\\\"></span></th> <!-- ... other headers ... --> </tr> @foreach (var standard in Model) { <tr id=\\\"@standard.Uid\\\" class=\\\"@rowClass hand\\\" ...> <td><a href=\\\"@navigateScript\\\">@standard.Title</a></td> <!-- ... other columns ... --> </tr> } }  ","language":"html"} 

Possible fix:

while (!empty($result) && $result[0] === '.') {
    $result = substr($result, 1);
}

Environment:

• PHP 8.4.11
• Laravel 12.25.0
• Phiki 2.0.0-beta4

Seems to be related with some "@" or on html lang

[ryangjchandler]

@magarrent Should be fixed now in v2.0.0-beta5 :)