Description:
------------
As of PHP 7.4.0, __toString() methods are allowed to throw
exceptions, what is not handled properly by the dbase extension,
so that incomplete records may be written to the database.

That also affects dbase_create(), but missing to handle exceptions
here only leads to confusing warnings.


Test script:
---------------
<?php
class Foo {
    public function __toString() {
        throw new Exception("not allowed");
    }
}
$def = [["name1", "c", 10], ["name2", "c", 10]];
$dbase = dbase_create(__DIR__ . "/dbase.dbf", $def);
try {
    dbase_add_record($dbase, ["cmb", new Foo]);
} catch (Exception $ex) {}
var_dump(dbase_numrecords($dbase));
?>


Expected result:
----------------
int(0)


Actual result:
--------------
int(1)