Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Install NodeJS in Linux
Answer:
In order to install NodeJS in Linux, the recommended way is compile from source and install it.
# wget http://nodejs.org/dist/node-v0.4.11.tar.gz
# tar zxf node-v0.4.11.tar.gz
# cd node-v0.4.11
# ./configure
# sudo make && make installNow you can type node to enter the node's REPL
How to remove object from array inside foreach loop?
Answer:
In PHP, to remove object (e.g. with the key = foo in the following example) from array inside foreach loop, you can try:
<?php
foreach($array as $key=> $value) {
if ($key == "foo") {
unset($array[$key]);
}
}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
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");
