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Warning: include() [function.include]: Failed opening 'header.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/laura/public_html/index.php on line 1

Warning: mysqli::mysqli() [mysqli.mysqli]: (HY000/2005): Unknown MySQL server host 'DB_HOST' (13) in /home/laura/public_html/php/image_collage.php on line 5
Failed to connect to MySQL: (2005) Unknown MySQL server host 'DB_HOST' (13)
Warning: mysqli::query() [mysqli.query]: Couldn't fetch mysqli in /home/laura/public_html/php/image_collage.php on line 10

Fatal error: Call to a member function data_seek() on a non-object in /home/laura/public_html/php/image_collage.php on line 15