TYPO3 Core

The main script index_ts.php calls the tslib_fe method initFEuser.

This method calls the TYPO3_DB->cleanIntList method with a parameter fetched by t3lib_div::_GP('pid') on line 623 (TYPO3 Version 4.5.12).

If there is no GET parameter "pid" the parameter passed to TYPO3_DB->cleanIntList is NULL but had to be a string type to call the t3lib_div::intExplode method

So every time you call the index_ts.php without the GET parameter "pid" the sys_log table will be filled with an entry like this:

"Core: Error handler (FE): PHP Warning: explode() expects parameter 2 to be string, array given in /typo3_src-4.5.12/t3lib/class.t3lib_div.php line 1946" 

"Core: Error handler (FE): PHP Warning: array_map(): Argument #2 should be an array in /typo3_src-4.5.12/t3lib/class.t3lib_div.php line 1949"

This bug could be easily solved by mapping the parameter to string like this:

typo3/sysext/cms/tslib/class.tslib_fe.php: line 623
$this->fe_user->checkPid_value = $GLOBALS['TYPO3_DB']->cleanIntList((string)t3lib_div::_GP('pid'));    // List of pid's acceptable

best regards
Christian