includes/Database/YDB.php
public function set_emulate_state() {
        try {
            $this->is_emulate_prepare = $this->getAttribute(PDO::ATTR_EMULATE_PREPARES);
        } catch (\PDOException $e) {
            $this->is_emulate_prepare = false;
        }
    }
public function set_emulate_state() {
        try {
            $this->is_emulate_prepare = $this->getAttribute(PDO::ATTR_EMULATE_PREPARES);
        } catch (\PDOException $e) {
            $this->is_emulate_prepare = false;
        }
    }
Check if we emulate prepare statements, and set bool flag accordingly

Check if current driver can PDO::getAttribute(PDO::ATTR_EMULATE_PREPARES)
Some combinations of PHP/MySQL don't support this function. See
https://travis-ci.org/YOURLS/YOURLS/jobs/271423782#L481

@since  1.7.3
@return void