jpgraph seems to be finally dying with PHP. (#1926)

* jpgraph seems to be finally dying with PHP. Until we have a valid alternative, disabling this run for PHP because it errors

https://github.com/HuasoFoundries/jpgraph looks like a natural successor, but it isn't BC so it will require some work to integrate

samples/Chart/35_Chart_render.php

@@ -5,6 +5,11 @@ use PhpOffice\PhpSpreadsheet\Settings;
 
 require __DIR__ . '/../Header.php';
 
+if (PHP_VERSION_ID >= 80000) {
+    $helper->log('Jpgraph no longer runs against PHP8');
+    exit;
+}
+
 // Change these values to select the Rendering library that you wish to use
 Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
 

tests/PhpSpreadsheetTests/Helper/SampleTest.php

@@ -30,6 +30,7 @@ class SampleTest extends TestCase
         $skipped = [
             'Chart/32_Chart_read_write_PDF.php', // Unfortunately JpGraph is not up to date for latest PHP and raise many warnings
             'Chart/32_Chart_read_write_HTML.php', // idem
+            'Chart/35_Chart_render.php', // idem
         ];
         // TCPDF and DomPDF libraries don't support PHP8 yet
         if (\PHP_VERSION_ID >= 80000) {