Description: ------------ removeColumn uses object comparison (DataGrid.php, line 1088), which may lead to the following php error: Fatal error: Nesting level too deep - recursive dependency? in /usr/share/php/Structures/DataGrid.php on line 1088 This happens when the column in subject has a formatter set with a class/method callback type, with the class harboring a circular/recursive reference. As php4 compares objects, not by reference, but by all attributes recursively, the comparison would go on forever. Test script: --------------- class Test { function Test() { $this->dg =& new Structures_DataGrid(); $this->dg->bind('SELECT * FROM my_table', $options); $column =& $this->dg->getColumnByField('id'); $column->setFormatter(array (&$this, 'formatter')); $this->dg->removeColumn($column); } function formatter($param) { // format string } } Expected result: ---------------- hidden column Actual result: -------------- Fatal error: Nesting level too deep - recursive dependency? in /usr/share/php/Structures/DataGrid.php on line 1088

Your example class fails also with PHP 5.2. I'll try to find a solution.

Thank you for your bug report. This issue has been fixed in the latest released version of the package, which you can download at http://pear.php.net/get/Structures_DataGrid