PHP according to Rasmus Lerdorf, who recently headlined the PHPCon East 2003 show at the Park Central Hotel in New York City.
Rasmus Lerdorf, the inventor of PHP, recently
headlined the PHPCon East 2003 show at the Park Central Hotel in New York City.
Along with a keynote address, Lerdorf ran a session called “tips & tricks.”
The following tip is taken from that session. To get additional tips from that
session, please visit http://lerdorf.com/nytips.pdf.
5 tips for optimizing
PHP
1)
Don't use a regex if you don't have to, instead, use PHP’s string manipulation
functions. For example:
BAD: <? $new = ereg_replace("-","_",$str);
?>
GOOD:<? $new = str_replace("-","_",$str);
?>
BAD: <?
preg_match('/(\..*?)$/',$str,$reg);?>
GOOD:<? substr($str,strrpos($str,'.'));
?>
2)
No references. Usually it is not faster to use references because of PHP's
copy-on-write nature.
3)
Use Persistent Database connections. Some databases are slower than others at
establishing new connections, and the slower the database, the more of an impact
using persistent connections will have. Keep in mind, however, that persistent
connections will use resources even when not in use.
4)
Take a look at MySQL unbuffered query. If you’re using MySQL, check out
mysql_unbuffered_query(). You use it exactly like you would mysql_query(), the
difference is that instead of waiting for the entire query to finish and storing
the result in the client API, an unbuffered query makes results available as
soon as possible and they are not allocated in the client API. You get access to
your data quicker and use a lot less memory. But you can't use mysql_num_rows()
on the result resource and it is likely to be slightly slower for small
selects.
5)
Keep it simple. Don't over-architect things. If your solution seems complex to
you, there is probably a simpler and more obvious approach.
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