Severity: Warning
Message: key() expects parameter 1 to be array, null given
Filename: models/Highcharts_model.php
Line Number: 113
Severity: Warning
Message: array_keys() expects parameter 1 to be array, null given
Filename: models/Highcharts_model.php
Line Number: 89
Severity: Warning
Message: array_merge(): Expected parameter 2 to be an array, null given
Filename: models/Highcharts_model.php
Line Number: 89
Severity: Warning
Message: array_unique() expects parameter 1 to be array, null given
Filename: models/Highcharts_model.php
Line Number: 92
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: models/Highcharts_model.php
Line Number: 96
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: models/Frequencies_model.php
Line Number: 201
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