Example:
* * * * * /usr/bin/php /full/path/to/script.php arg1 arg2 > /full/path/to/logfile.log
The script runs and accesses the arguments ju
It looks like you are searching for the log file in the wrong folder. Try this
* * * * * cd /path/to/script.php ; ./script.php arg1 arg2 >> logfile.log
Then look for your log file in the /path/to/script folder. It can also be a write permission problem. Also, check your script for errors. Your crontab command seems OK.
Does the command work correctly from the command line? It may be possible that the arguments contain some characters treated specially by shell. In that case you need to quote the whole command to prevent shell from tinkering with the arguments.