Check if a file exist in Bash Shell
Answer:
The following script demonstrates how to check if a file exist, using shell (Bash) script
#!/bin/bash
if [ -e test.txt ]
then
echo 'The file exists.'
else
echo 'The file does not exist.'
fi
Aug 052011
Validate IP address in PHP
Answer:
If you are using PHP 5.2 or above (in fact, at the moment of writing, you should use at least PHP 5.3+), you can use the following easy method:
if(filter_var($ip, FILTER_VALIDATE_IP))
{
// Valid IP
}
else
{
// Invalid IP
}Get the current PHP include path's setting
Answer:
To get the current PHP include path's setting, you can use the function get_include_path
E.g.
echo get_include_path();Usually it is used with the set_include_path for adding extra path to the existing include_path,
E.g.
set_include_path(get_include_path() . PATH_SEPARATOR . "/data/path");Check the amount of memory used by PHP
Answer:
To check the amount of memory used by PHP process, use the function - memory_get_usage
E.g.
// Returns the amount of memory, in bytes, that's currently being allocated to your PHP script.
echo memory_get_usage(); Jul 092011
Turn off magic_quotes_gpc in PHP
Answer:
magic_quotes_gpc is a legacy PHP function that no longer be supported in PHP 6.0. So you should disable them to make sure your application not break in the future version of PHP.
To disable it, edit the php.ini
vi /etc/php.ini
Locate and set
magic_quotes_gpc = off;Remember to restart web server such as Apache if needed.
