In PHP when you have a string and want to find out if it contains another string, there are a few ways to do it. You can use regular expressions, use the strstr functions and a few other methods. The easiest way though is probably by using strpos, which returns the number of the character containing the first occurrence of the thing you’re looking for - and false if the string isn’t found.
When using memcache from PHP, you can save values with either set or replace. You can probably safely ignore the replace method:
“Memcached::replace() is similar to Memcached::set(), but the operation fails if the key does not exist on the server.”
In PHP many things can be done several different ways. Picking which way to do something may be a matter of personal taste or habit. Sometimes however, things may be much clearer for the next developer, if you choose one way over another.
A very simple example of this, is adding a new item to an array. Often I come across this construct:
$valuepairs[] = 'Some value'It’s valid and compact syntax, but in terms of clarity, I’d prefer this construct anytime:
When playing the role of the DBA, it’s often useful to get a quick listing of how many rows each table in a database contains. The syntax for this is pretty simple in Mysql:
SELECT table_name, table_rows
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = '***database name***';Notice that when using innodb tables, it’s only a rough estimate.
If you’re using a Debian based Linux Desktop such as Ubuntu, Linux Mint - or Debian itself naturally - you can easily create a simple text file of all packages installed on the machine.
I have a habit of removing a lot of the “extras” (junk) which comes with the basic install - not religiously, but just to keep it reasonably tidy and not have too much stuff eating up the harddisk, requiring updates (without providing any value).