Updated Technical Wiki (markdown)

Technical-Wiki.md

@@ -17,3 +17,56 @@ The example.php can be used to limit the tables displayed to a specific list wit
 				return '';
 		}
 ````
+Different possibilities with columns to be displayed in the table initial listing:
+````
+		function fieldName($field, $order = 0) {
+/*
+$field = Array
+(
+    [field] => stock_id
+    [full_type] => varchar(20)
+    [type] => varchar
+    [length] => 20
+    [unsigned] => 
+    [default] => 
+    [null] => 
+    [auto_increment] => 
+    [on_update] => 
+    [collation] => utf8_general_ci
+    [privileges] => Array
+        (
+            [select] => 0
+            [insert] => 1
+            [update] => 2
+            [references] => 3
+        )
+
+    [comment] => Part#
+    [primary] => 1
+)
+*/
+			if ($order && preg_match('~_(md5|sha1)$~', $field["field"])) {
+				return ""; // hide hashes in select
+			}
+			// display only column with comments, first two of them plus searched columns and specific columns
+			if ($order < 2) {
+				return h($field["comment"]);
+			} else if ($order) {
+				if (preg_match('~^(ItemDesc|category_id|UPC)$~', $field["field"])) {
+					return h($field["comment"]); // chosen fields ItemDesc,category_id,UPC in select
+				}
+				if (preg_match('~(Price)$~', $field["field"])) {
+					return h($field["comment"]); // chosen field names in select ending with Price
+				}
+				if (preg_match('~^(Product#)$~', $field["comment"])) {
+					return h($field["comment"]); // chosen field label Product# in select
+				}
+			}
+			foreach ((array) $_GET["where"] as $key => $where) {
+				if ($where["col"] == $field["field"] && ($key >= 0 || $where["val"] != "")) {
+					return h($field["comment"]);
+				}
+			}
+			return "";
+		}
+````