(PHP 4, PHP <=5.2.0) Writes a string into the slob object

(PHP 4 <= 4.1.0, PECL dbplus >= 0.9) Set index

(PHP 5, PHP 7) Alias of

(PECL mongo >=0.9.2) Return an explanation of the query, often useful for optimization and debugging

(PHP 4, PHP 5, PHP 7) Close mSQL connection bool

(PECL tokyo_tyrant >= 0.1.0) Restore the database

(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0) Register an aggregating UDF for use in SQL statements

(PHP 5 >= 5.4.4, PHP 7) Escape a literal for insertion into a text field

(PECL maxdb >= 1.0) Adjusts the result pointer to an arbitary row in the result

(PHP 4, PHP <=5.2.0) Returns error code of last Informix call