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Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

PostgreSQL configuration options
Name Default Changeable Changelog
pgsql.allow_persistent "1" PHP_INI_SYSTEM  
pgsql.max_persistent "-1" PHP_INI_SYSTEM  
pgsql.max_links "-1" PHP_INI_SYSTEM  
pgsql.auto_reset_persistent "0" PHP_INI_SYSTEM Available since PHP 4.2.0.
pgsql.ignore_notice "0" PHP_INI_ALL Available since PHP 4.3.0.
pgsql.log_notice "0" PHP_INI_ALL Available since PHP 4.3.0.
For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

pgsql.allow_persistent boolean

Whether to allow persistent Postgres connections.

pgsql.max_persistent integer

The maximum number of persistent Postgres connections per process.

The maximum number of Postgres connections per process, including persistent connections.

pgsql.auto_reset_persistent integer

Detect broken persistent links with pg_pconnect(). Needs a little overhead.

pgsql.ignore_notice integer

Whether or not to ignore PostgreSQL backend notices.

pgsql.log_notice integer

Whether or not to log PostgreSQL backends notice messages. The PHP directive pgsql.ignore_notice must be off in order to log notice messages.

PHP Manual