--TEST-- Test popen() and pclose function: error conditions --SKIPIF-- --FILE-- --CLEAN-- --EXPECTF-- *** Testing for error conditions *** Warning: popen() expects exactly 2 parameters, 0 given in %s on line %d NULL Warning: popen() expects exactly 2 parameters, 1 given in %s on line %d NULL Warning: popen(abc.txt,rw): Invalid argument in %s on line %d bool(false) Warning: pclose() expects exactly 1 parameter, 0 given in %s on line %d bool(false) Warning: pclose() expects exactly 1 parameter, 2 given in %s on line %d bool(false) Warning: pclose() expects parameter 1 to be resource, integer given in %s on line %d bool(false) --- Done ---'abc.txt' is not recognized as an internal or external command, operable program or batch file.