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Script language for dynamic web-pages. The syntax and concepts used are similar to Perl

Loop over an associative array (hash):

foreach ( $_POST as $key => $value ) {
            echo $key.' '.$value.' '.$_POST[$key].'<br>';

Return the shellcommand with everything that might confuse the shell escaped.
Executed <cmd> in the shell, append the command output to he array <outputarray> and set <returnvar> to the returnvalue of the command.
Also the last line of the command output is returned
Execute <cmd> (output from excapedshellcmd) in the shell, return the command output.


Function have global scope, you do not need to declare them before calling

function func1($arg1, $arg2)
    return $value;


On debian (and its derivates)

apt-get install php-fpm php-mysql
Install php7 and mysql support
Fix php security by editing /etc/php/7.0/fpm/php.ini
Uncomment line with cgi.fix_pathinfo and set it to 0