Wenn in Wordpress ein eigenes tmp Verzeichnis benötigt wird, muss man in der config Datei folgendes eintragen:
define('WP_TEMP_DIR', dirname(__FILE__) . '/wp-content/temp/');
Das sind die Fehlermeldungen dazu (ganz schön viele für so einen kleinen unschuldigen Temp Ordner):
Fatal error: Uncaught UnexpectedValueException: DirectoryIterator::__construct(/tmp/):
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failed to open dir: Permission denied in /www/htdocs/w00..../ordner/ordner/wp-content/plugins/tribe-ext-pdf-tickets/vendor/mpdf/mpdf/src/Cache.php:87
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Stack trace: #0 /www/htdocsw00..../ordner/ordner/wp-content/plugins/tribe-ext-pdf-tickets/vendor/mpdf/mpdf/src/Cache.php(87):
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DirectoryIterator->__construct('/tmp/') #1 /www/htdocs/w00..../ordner/ordner/wp-content/plugins/tribe-ext-pdf-tickets/vendor/mpdf/mpdf/src/Mpdf.php(9464):
Mpdf\Cache->clearOld() #2 /www/htdocs/w00..../ordner/ordner/wp-content/plugins/tribe-ext-pdf-tickets/tribe-ext-pdf-tickets.php(1575):
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Mpdf\Mpdf->Output('/www/htdocs/w00...', 'F') #3 /www/htdocs/w00..../ordner/ordner/wp-content/plugins/tribe-ext-pdf-tickets/tribe-ext-pdf-tickets.php(846):
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Tribe__Extension__PDF_Tickets->output_pdf('<!DOCTYPE html ...', '/www/htdocs/w00...')
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#4 /www/htdocs//w00..../ordner/ordner/wp-includes/class-wp-hook.php(289):
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Tribe__Extension__PDF_Tickets->do_upload_pdf(11) #5 /www/h in /www/htdocs//w00..../ordner/ordner/wp-content/plugins/tribe-ext-pdf-tickets/vendor/mpdf/mpdf/src/Cache.php
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on line 87