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--- en:create:databank [08.07.2016 20:11] – [Import Data] ncruz
+++ en:create:databank [26.11.2020 20:59] – [Example 4: Relay A Priori Data] sophia.schauer
@@ Line 199: / Line 199: @@
 // now show the question
 question('ST01');
+</code>
+===== Example 5: Complete Data =====
+To add an entry to the database for content during the interview, it must be read out, added and then written again.
+For example, under the key "FS-<Serial number>" a-priori data was stored (3 entries per person, i.e. indices 0 to 2). In survey wave 1 a product preference from question PP01 is now to be added as fourth date (index 3). The following PHP code could then be placed on the page __after__ the page with PP01 (see notes on ''[[:en:create:functions:value]]'')
+<code php>
+$key = 'FS-'.caseSerial();
+// Reading data
+$data = dbGet($key);
+if ($data === false) {
+  // No data found - maybe show warning
+  $data = array(-8, -8, -8);  // ... and initialize the data element
+}
+// Add the answer from PP01
+$data[3] = value('PP01');
+// save entry again
+$data = dbSet($key, $data);
 </code>