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Merge pull request #156 from briannesbitt/patch-3

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Added small paragraph on connections
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Phil Sturgeon
2012-08-06 12:20:07 -07:00
parent e6c68e6a9d 63e0b2ee73
commit 6b35bbc23f
1 changed files with 9 additions and 0 deletions
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_posts/06-01-01-Databases.md
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@@ -54,6 +54,14 @@ database preventing potential SQL injection attacks.
* [Learn about PDO][1] * [Learn about PDO][1]
You should also be aware that database connections use up resources and it was not unheard-of to have resources
exhausted if connections were not implicitly closed, however this was more common in other languages. Using PDO you
can implicitly close the connection by destroying the object by ensuring all remaining references to it are deleted,
ie. set to NULL. If you don't do this explicitly, PHP will automatically close the connection when your script ends
unless of course you are using persistent connections.
* [Learn about PDO connections][5]
## Abstraction Layers ## Abstraction Layers
Many frameworks provide their own abstraction layer which may or may not sit on top of PDO. These will often emulate features for Many frameworks provide their own abstraction layer which may or may not sit on top of PDO. These will often emulate features for
@@ -71,6 +79,7 @@ Some abstraction layers have been built using the PSR-0 namespace standard so ca
[2]: http://www.doctrine-project.org/projects/dbal.html [2]: http://www.doctrine-project.org/projects/dbal.html
[3]: http://framework.zend.com/manual/en/zend.db.html [3]: http://framework.zend.com/manual/en/zend.db.html
[4]: http://packages.zendframework.com/docs/latest/manual/en/index.html#zend-db [4]: http://packages.zendframework.com/docs/latest/manual/en/index.html#zend-db
[5]: http://php.net/manual/en/pdo.connections.php
[mysql]: http://uk.php.net/mysql [mysql]: http://uk.php.net/mysql
[mysqli]: http://uk.php.net/mysqli [mysqli]: http://uk.php.net/mysqli