The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable | Changelog | 
|---|---|---|---|
| amqp.host | localhost | PHP_INI_ALL | |
| amqp.vhost | / | PHP_INI_ALL | |
| amqp.port | 5672 | PHP_INI_ALL | |
| amqp.login | guest | PHP_INI_ALL | |
| amqp.password | guest | PHP_INI_ALL | |
| amqp.auto_ack | 0 | PHP_INI_ALL | |
| amqp.min_messages | 0 | PHP_INI_ALL | |
| amqp.max_messages | 1 | PHP_INI_ALL | |
| amqp.prefetch_count | 3 | PHP_INI_ALL | 
Here's a short explanation of the configuration directives.
amqp.host
      string
     The host to which to connect.
amqp.vhost
      string
     The virtual host on the broker to which to connect.
amqp.port
      integer
     The port on which to connect.
amqp.login
      string
     The login to use while connecting to the broker.
amqp.password
      string
     The password to use while connecting to the broker.
amqp.auto_ack
      integer
     
       Whether calls to AMQPQueue::get() and AMQPQueue::consume() should require that the client explicitly acknowledge messages. Setting this value to 1 will pass in the AMQP_AUTOACK flag to the above method calls if the flags field is omitted. 
      
amqp.min_messages
      integer
     The minimum number of messages to require during a call to AMQPQueue::consume().
amqp.max_messages
      integer
     The maximum number of messages to require during a call to AMQPQueue::consume().
amqp.prefetch_count
      integer
     
       The number of messages to prefect from the server during a call to AMQPQueue::get() or AMQPQueue::consume() during which the AMQP_AUTOACK flag is not set.