{"id":6490,"date":"2012-12-19T15:17:46","date_gmt":"2012-12-19T15:17:46","guid":{"rendered":"http:\/\/www.oik-plugins.com\/?page_id=6490"},"modified":"2015-08-26T08:48:08","modified_gmt":"2015-08-26T08:48:08","slug":"start-tracing-from-wp-config-php","status":"publish","type":"page","link":"https:\/\/www.oik-plugins.com\/wordpress-plugins-from-oik-plugins\/free-oik-plugins\/oik-trace-plugin\/start-tracing-from-wp-config-php\/","title":{"rendered":"Start tracing from wp-config.php"},"content":{"rendered":"There may be times when you want to activate debug trace for WordPress even before plugins get loaded.\r\nYou can do this by editing your wp-config.php<\/code> file. Just before the end of the file, which is normally,\r\n
\r\n<\/span>require_once<\/span>(<\/span>ABSPATH<\/span> <\/span>.<\/span> <\/span>'wp-settings.php'<\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\nIf we want to include bw_trace2<\/a>(), bw_backtrace<\/a>() or bw_trace<\/a>() calls in WordPress core \r\nthen we need to define the functions, so we include libs\/bwtrace.php<\/code>, assuming it’s present.\r\n\r\nWe also need to define the constants to activate tracing and action counting at config startup.\r\nSet the values to true<\/code> to activate, false<\/code> otherwise.\r\n\r\nAdd the following code to wp-config.php<\/code>\r\n\r\n
\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_TRACE_CONFIG_STARTUP'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_TRACE_ON'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_COUNT_ON'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_TRACE_RESET'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span>if<\/span> <\/span>(<\/span> <\/span>file_exists<\/a><\/span>(<\/span> <\/span>ABSPATH<\/span> <\/span>.<\/span> <\/span>'\/wp-content\/plugins\/oik-bwtrace\/libs\/bwtrace.php'<\/span> <\/span>)<\/span> <\/span>)<\/span> <\/span>{<\/span>\r\n  <\/span>require_once<\/span>(<\/span> <\/span>ABSPATH<\/span> <\/span>.<\/span> <\/span>'\/wp-content\/plugins\/oik-bwtrace\/libs\/bwtrace.php'<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span>}<\/span>\r\n<\/span> <\/pre>\r\n\r\n
BW_TRACE_CONFIG_STARTUP<\/h3>\r\nTo start tracing from wp-config.php<\/code> define the BW_TRACE_CONFIG_STARTUP<\/code> constant as true<\/code>.\r\n
\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_TRACE_CONFIG_STARTUP'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\n
BW_TRACE_ON<\/h3>\r\nTo activate trace logic define the BW_TRACE_ON<\/code> constant as true<\/code>.\r\n
\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_TRACE_ON'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\n
BW_COUNT_ON<\/h3>\r\nTo activate action counting define the BW_COUNT_ON<\/code> constant as true<\/code>.\r\n\r\nThis constant allows the db.php<\/code> drop-in file to control whether or not action counting is activated as part of the drop-in processing.  \r\n\r\nWhen you’re not interested in action counting this value should be false<\/code>. \r\n
\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_COUNT_ON'<\/span>,<\/span> <\/span>false<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\n
BW_TRACE_RESET<\/h3>\r\nIf we want the trace log file to be reset then we also need to define BW_TRACE_RESET<\/code> as true<\/code>.\r\n\r\n
\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'BW_TRACE_RESET'<\/span>,<\/span> <\/span>false<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\n
SAVEQUERIES<\/h3>\r\nIf you don’t define SAVEQUERIES<\/code> then oik-bwtrace will enable it if required, but you may miss the first few queries. For example, the one that is performed to load the options that define tracing behaviour.\r\n\r\n
\r\n<\/span>define<\/a><\/span>(<\/span> <\/span>'SAVEQUERIES'<\/span>,<\/span> <\/span>true<\/span> <\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\n
DISABLE_WP_CRON<\/h3>\r\nThere may be times when the trace output you see is for cron processing.\r\nIf this is bothering you then you can disable it.\r\n
\r\n<\/span>define<\/a><\/span>(<\/span>'DISABLE_WP_CRON'<\/span>,<\/span> <\/span>'true'<\/span>)<\/span>;<\/span>\r\n<\/span> <\/pre>\r\n\r\n\r\n\r\n
Notes:<\/h4>\r\n