PHPで「Only variables should be passed by reference....」エラー - Qiita
Strict Standards: Only variables should be passed by reference in的解决方法-吾爱编程网
Vinohrady Čejkovická ‹ Rekonstrukce bytového jádra Brno
php - Error message while trying to upload image - Stack Overflow
Strict Standards: Only variables should be passed by reference in /path/wp-content/themes/CherryFramework/functions.php on line 279 · Issue #27 · CherryFramework/CherryFramework · GitHub
Notice Only variables should be passed by reference in php:(Fixed) - YouTube
Recursos educativos - Nomes e Voces
When graphing HRULE items, 'Only Variables should be passed by reference' error may be seen · Issue #2724 · Cacti/cacti · GitHub