documentation/IS4C/developer/api/receipt/filter.html
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<title>DefaultReceiptFilter</title>
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<h2>DefaultReceiptFilter</h2>
<a href="#change_log">Revised: 10Apr2013</a>
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<p>Filtering data is the second step in building a receipt. Modules
implementing DefaultReceiptFilter take the SQL result from the first
step and return an array of records. The filtering step may discard
some of the records from the SQL result, create additional records,
or both. Subclasses must implement the method <b>filter</b> which
takes a SQL result as an argument and returns an array of records.
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<p><b>Example</b>:
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class ExampleFilter extends DefaultReceiptFilter {
function filter($data){
$db = Database::tDataConnect();
$results = array();
while($row = $db->fetch_row($data)){
// filter out logging records
if ($row['trans_type'] != 'L')
$results[] = $row;
}
return $results;
}
}
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<a name="change_log">Change Log:</a>
10Apr13 Andy Theuninck - Created document
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