If var is defined AND NOT EMPTY, use var, otherwise set a default variable under Bash. For e.g. my script needs a parameter for output variable. It can be text or html. I set it as follows in my script
output=$1 # either text or html
However, sometime user forget to pass the parameter to my shell script and my enter logic fails. So how do I set default value to text, if no parameter passed?
I own a small business website. However, bots started to abusing my forms such as contact.php. How do I stop bots bots from abusing my site? How do I tell if PHP form is submitted by a person or a script?
How do I change user password using a shell script under FreeBSD operating systems?
Can you explain usage of predefined variables called $_SERVER[‘PHP_SELF’]?
I‘ve installed a Web server (Apache2) and like to use Python interpreter correctly. How do I configure mod_python under Debian or Ubuntu Linux running Apache server version 2.x?
ow do I install GNU/GCC compiler and related tools (such as make, debugger, man pages) collection under Debian Linux system using command line options?