MongoDB::prevError Checks for the last error thrown during a database operation &reftitle.description; public arrayMongoDB::prevError MongoDB::lastError is usually preferred to this. This method returns the last database error that occurred and how many operations ago it occurred. It is mostly deprecated. &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; Returns the error and the number of operations ago it occurred. &reftitle.changelog; &Version; &Description; 1.2.11 Emits E_DEPRECATED when used.