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Clustering and High-Availability check_hadoop_hdfs_webhdfs.pl (Advanced Nagios Plugins Collection)
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Invalid argument supplied for foreach()

I (with PHP 5.2.6) allways get this error, when i execute it:

./check_wp_version /srv/www/sc-rheinau/html/

Warning: Invalid argument supplied for foreach() in /opt/nagios check_wp_version on line 52
OK – core ok ; plugins ok ; themes ok

Where is the mistake?