MongoDB driver operations throws exceptions in case of any database operations and can be captured easily using following syntax:

try {

} catch (MongoDBDriverExceptionException $e) {	   
   echo "Exception:", $e->getMessage(), "<br/>";
   echo "File:", $e->getFile(), "<br/>";
   echo "Line:", $e->getLine(), "<br/>";    
}

Example

Try the following example to check database operation error in MongoDB server −

Copy and paste the following example as mongodb_example.php −

<?php
   try {
	  // connect to mongodb
      $manager = new MongoDBDriverManager("mongodb://localhost:27017");
	   
      // Create a Command Instance
      $createCollection = new MongoDBDriverCommand(["create" => "sampleCollection"]);

      // Execute the command on the database
      $cursor = $manager->executeCommand("myDb", $createCollection);
   
      echo "Collection created.";
   } catch (MongoDBDriverExceptionException $e) {	   
      echo "Exception:", $e->getMessage(), "<br/>";
      echo "File:", $e->getFile(), "<br/>";
      echo "Line:", $e->getLine(), "<br/>";
   }
?>

Output

Access the mongodb_example.php deployed on apache web server and verify the output.

Exception:Collection already exists. NS: myDb.sampleCollection
File: htdocsphp_mongodbmongodb_example.php
Line:10