Michael Hawkins 6d26ba77f3
MDL-72096 core: Add safe ORDER BY helpers for db sorting from user input ...
The new get_safe_orderby() and get_safe_orderby_multiple() methods
provide a centralised safe way for user submitted sorting values to be
incorporated into SQL ORDER BY. They do this by removing the need for
user submitted data to pass in any SQL and not allowing arbitrary
column values, instead using string keys which map to a predefined
list of allowed sortable columns.
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Michael Hawkins
6d26ba77f3