Write HTML - NOTICE Uninitialized string offset - XXXX on Otl.php

[jzafrilla]

Guidelines

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Description of the bug

This notice appears on this line:

$a = (ord($this->ttfOTLdata[$this->_pos]) << 8) + ord($this->ttfOTLdata[$this->_pos + 1]);

maybe it can be fixed with (or no...):
if (isset($this->ttfOTLdata[$this->_pos]) && isset($this->ttfOTLdata[$this->_pos + 1])) { $a = (ord($this->ttfOTLdata[$this->_pos]) << 8) + ord($this->ttfOTLdata[$this->_pos + 1]); } else { $a = 0; }

StackTrace: 
Uninitialized string offset: 40456 [APP/Vendor/mpdf/mpdf/src/Otl.php, line 5906

Mpdf\Otl::read_ushort() - APP/Vendor/mpdf/mpdf/src/Otl.php, line 5906
Mpdf\Otl::_applyGSUBsubtable() - APP/Vendor/mpdf/mpdf/src/Otl.php, line 1778
Mpdf\Otl::_applyGSUBrules() - APP/Vendor/mpdf/mpdf/src/Otl.php, line 1317
Mpdf\Otl::applyOTL() - APP/Vendor/mpdf/mpdf/src/Otl.php, line 974
Mpdf\Mpdf::WriteHTML() - APP/Vendor/mpdf/mpdf/src/Mpdf.php, line 13595
ReportsController::generateReportView() - APP/Plugin/Report/Controller/ReportsController.php, line 523
ReportsController::viewReport() - APP/Plugin/Report/Controller/ReportsController.php, line 437

mPDF version

8.2.x

PHP Version and environment (server type, cli provider etc., enclosing libraries and their respective versions)

7.4.3

Reproducible PHP+CSS+HTML snippet suffering by the error

<style type="text/css">
        .tg {
                border-collapse: collapse;
                border-spacing: 0;
                width: 100%;
        }

        .tg td {
                font-family: Arial, sans-serif;
                font-size: 11px;
                padding: 5px;
                border-style: solid;
                border-width: 1px;
                overflow: hidden;
                word-break: normal;
                border-color: #888888;
        }

        .tg th {
                font-family: Arial, sans-serif;
                font-size: 12px;
                font-weight: normal;
                padding: 5px;
                border-style: solid;
                border-width: 1px;
                overflow: hidden;
                word-break: normal;
                text-align: left;
                border-color: #888888;
        }

        .tg .tg-yw4l {
                vertical-align: top;
                word-wrap: break-word;
        }

        .tg .cabecera {
                background: lightgray;
                text-align: left;
                font-weight: bold;
                padding: 5px;
                font-size: 14px;
        }

        .tg #resumen {
                font-size: 12px;
                margin: 5px 0;
        }

        .tg .title {
                text-align: right!important;
                font-weight: bold;
                font-size: 14px;
                border-color: transparent;
                padding-bottom: 0;
        }

        .tg .subtitle {
                text-align: right!important;
                font-size: 12px;
                border-left-color: transparent;
                border-right-color: transparent;
        }

        .tg .logo {
                border-top-color: transparent;
                border-left-color: transparent;
                border-right-color: transparent;
        }

        .cabeceraColumnas {
        background-color: #89CCE2;
        color: #FFFFFF;
    }
</style>


<table class="tg" style="word-wrap: break-word; width: 100%;">
        <tbody>
        <tr>
                <td style="border: none;" class="logo" rowspan="2" colspan="3">
                        <img src="img/header_logo/traceusbynunsys2.png" />
                </td>
                <td class="title" colspan="8">COLEGIO PRUEBAS</td>
        </tr>
        <tr>
                <td style="border: none;" class="subtitle" colspan="8">Estado de Alumnos y Paradas – 13/06/2024</td>
        </tr>
        <tr class="cabeceraColumnas"><td class="tg-yw4l" style="word-wrap: break-word;"><b>Hora Registro</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Hora Paso Prevista</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Ruta</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Parada</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Referencia</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Nombre Alumno</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Grupo</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Evento</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Tipo Registro</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Anotaciones</b></td><td class="tg-yw4l" style="word-wrap: break-word;"><b>Observaciones</b></td></tr><tr><td colspan="11">No existen datos a mostrar</td></tr>       </tbody>
</table>

<form action="reports/viewReport" method="GET" id="pdf_form">
        <input type="hidden" name="report" value="alumnos_estado">
        <input type="hidden" name="view_mode" value="PDF_HORIZONTAL">
</form>

<form action="reports/viewReport" method="GET" id="excel_form">
        <input type="hidden" name="report" value="alumnos_estado">
        <input type="hidden" name="view_mode" value="EXCEL">
</form>

[finwe]

Unable to reproduce, show the PHP code. Can reopen then.