Define a constant in PHP
Answer:
To define a constant in PHP, you can use define()
define ("PI", 3.1415);
echo PI;
Apr 192010
Linux Ask!
Apr 182010
Repair table in MySQL
Answer:
If you are using the MyISAM storage engine, database might be corrupted when the computer was shutdown unexpectedly. To repair the table, you can use the following command in the MySQL client.
mysql> REPAIR TABLE my_table;
Apr 172010
Convert string to integer in Python
Answer:
You can use the built-in int() type constructor, e.g.
int('123') == 123
Apr 162010
Difference between die and exit in Perl?
Answer:
The main differences:
- die can output a message, e.g. die("File not found"), exit cannot
- die is catchable using eval, exit just quit from the process anyway
Apr 152010
How to tell if Apache 2 is using prefork or worker MPM?
Answer:
If you are running in Red Hat Linux/ Fedora/ CentOS
# httpd -V
....
Architecture: 64-bit
Server MPM: Prefork
threaded: no
forked: yes (variable process count)
...
If you are running in Debian/ Ubuntu, you can use apache2 -V, which get the same output as above.
