mongoconnectionexception(3) [php man page]

MONGOCONNECTIONEXCEPTION(3)						 1					       MONGOCONNECTIONEXCEPTION(3)

The MongoConnectionException class

INTRODUCTION

	Thrown when the driver fails to connect to the database.

	There are a number of possible error messages to help you diagnose the connection problem. These are:

	      o No  candidate  servers	found  Thrown when the driver cannot establish a connection to MongoDB (fulfilling the ReadPreferences, if
		specified).

	      o No server name given. This error occurs if you pass in "" as the server name, probably because of an typo with	string	interpola-
		tion, e.g., "$servr" instead of "$server".

	      o
		 failed to get host [hostname] or port [portnum] from [server].  This indicated that the server string was malformed. "[hostname]"
		and "[portnum]" will be as much as the driver could dicipher of it.

	      o Operation in progress Connecting to the database timed out.

	      o Transport endpoint is not connected Generally means that the connection string isn't correct, the driver couldn't  even  find  the
		database server.

	      o couldn't determine master No server in a replica set connection was identified as the primary.

	      o couldn't  get  host  info for [server] This indicated that DNS could not resolve the server address you gave. This could easily be
		caused by a typo, for example, "server" instead of "$server".

	      o Invalid Argument This can be caused by attempting to connect to a machine that is up but that the database isn't actually  running
		on. Make sure that you've started the database server before connecting.

	      o Permission  denied  This  means  that  the  socket could not be opened due to permissions issues. On Red Hat variants, this can be
		caused by a default setting that does not allow Apache to create network connections. You can override this setting by running:

	      $ /usr/sbin/setsebool -P httpd_can_network_connect 1

	If the error message is not listed above, it is probably an error from the C socket, and you can search the web for its usual cause.

CLASS SYNOPSIS

       MongoConnectionException

       MongoConnectionExceptionextends
       MongoException

PHP Documentation Group 											       MONGOCONNECTIONEXCEPTION(3)

MYSQLND_MS_DUMP_SERVERS(3)						 1						MYSQLND_MS_DUMP_SERVERS(3)

mysqlnd_ms_dump_servers - Returns a list of currently configured servers

SYNOPSIS

       array mysqlnd_ms_dump_servers (mixed  $connection)

DESCRIPTION

	Returns a list of currently configured servers.

PARAMETERS

	      o $connection
		- A MySQL connection handle obtained from any of the connect functions of the mysqli, mysql or PDO_MYSQL extensions.

RETURN VALUES

       FALSE  on  error. Otherwise, returns an array with two entries masters and slaves each of which contains an array listing all corresponding
       servers.

	The function can be used to check and debug the list of servers currently used by the plugin. It is mostly useful when the list of servers
       changes at runtime, for example, when using MySQL Fabric.

       masters and slaves server entries

       +-----------------+--------------------------------------+---+
       |      Key	 |					|   |
       |		 |					|   |
       |		 |	       Description		|   |
       |		 |					|   |
       |		 |		 Version		|   |
       |		 |					|   |
       +-----------------+--------------------------------------+---+
       |		 |					|   |
       |name_from_config |					|   |
       |		 |					|   |
       |		 |  Server  entry  name from config, if |   |
       |		 | appliciable. NULL if  no  configura- |   |
       |		 | tion name is available.		|   |
       |		 |					|   |
       |		 |	       Since 1.6.0.		|   |
       |		 |					|   |
       |		 |					|   |
       |    hostname	 |					|   |
       |		 |					|   |
       |		 |	 Host name of the server.	|   |
       |		 |					|   |
       |		 |	       Since 1.6.0.		|   |
       |		 |					|   |
       |		 |					|   |
       |      user	 |					|   |
       |		 |					|   |
       |		 |  Database  user used to authenticate |   |
       |		 | against the server.			|   |
       |		 |					|   |
       |		 |	       Since 1.6.0.		|   |
       |		 |					|   |
       |		 |					|   |
       |      port	 |					|   |
       |		 |					|   |
       |		 |	TCP/IP port of the server.	|   |
       |		 |					|   |
       |		 |	       Since 1.6.0.		|   |
       |		 |					|   |
       |		 |					|   |
       |     socket	 |					|   |
       |		 |					|   |
       |		 |   Unix domain socket of the server.	|   |
       |		 |					|   |
       |		 |	       Since 1.6.0.		|   |
       |		 |					|   |
       +-----------------+--------------------------------------+---+
NOTES

       Note

	      mysqlnd_ms_dump_servers(3) requires PECL mysqlnd_ms >> 1.6.0.

EXAMPLES

       Example #1

	      mysqlnd_ms_dump_servers(3) example

	      {
		  "myapp": {
		      "master": {
			  "master1": {
			      "host":"master1_host",
			      "port":"master1_port",
			      "socket":"master1_socket",
			      "db":"master1_db",
			      "user":"master1_user",
			      "password":"master1_pw"
			  }
		      },
		      "slave": {
			   "slave_0": {
			       "host":"slave0_host",
			       "port":"slave0_port",
			       "socket":"slave0_socket",
			       "db":"slave0_db",
			       "user":"slave0_user",
			       "password":"slave0_pw"
			   },
			   "slave_1": {
			       "host":"slave1_host"
			   }
		      }
		  }
	      }

	      <?php
	      $link = mysqli_connect("myapp", "global_user", "global_pass", "global_db", 1234, "global_socket");
	      var_dump(mysqlnd_ms_dump_servers($link);
	      ?>

	      The above example will output:

	      array(2) {
		["masters"]=>
		array(1) {
		  [0]=>
		  array(5) {
		    ["name_from_config"]=>
		    string(7) "master1"
		    ["hostname"]=>
		    string(12) "master1_host"
		    ["user"]=>
		    string(12) "master1_user"
		    ["port"]=>
		    int(3306)
		    ["socket"]=>
		    string(14) "master1_socket"
		  }
		}
		["slaves"]=>
		array(2) {
		  [0]=>
		  array(5) {
		    ["name_from_config"]=>
		    string(7) "slave_0"
		    ["hostname"]=>
		    string(11) "slave0_host"
		    ["user"]=>
		    string(11) "slave0_user"
		    ["port"]=>
		    int(3306)
		    ["socket"]=>
		    string(13) "slave0_socket"
		  }
		  [1]=>
		  array(5) {
		    ["name_from_config"]=>
		    string(7) "slave_1"
		    ["hostname"]=>
		    string(11) "slave1_host"
		    ["user"]=>
		    string(12) "gloabal_user"
		    ["port"]=>
		    int(1234)
		    ["socket"]=>
		    string(13) "global_socket"
		  }
		}
	      }

PHP Documentation Group 												MYSQLND_MS_DUMP_SERVERS(3)