These are notes from the “PHP Course for Beginners” 6. Basics of PHP form Handling link check that method is POST by using the superglobal $_SERVER["REQUEST METHOD"] == "POST" every time y...

include? Check if an array includes a certain value. my_arr = [1,2,3,4] => [1, 2, 3, 4] my_arr.include? 4 => true

Rounding with .round: my_float = 3.1415926 my_float.round(2) => # 3.14

edit the previously open buffer :b#

First install it with: dnf install certbot python3-certbot-apache

Search for all instances of ‘a minimal’ recursively, starting from the current directory. grep -ri 'a minimal' .

$ echo $OSTYPE darwin24.0

filename = File.join(__dir__, "example.txt") test_string = "Hello world" File.open(filename, "w") do |f| f.write(test_string) end Often we want to append to a file instead (like a logfile): ...

Read the $PATH environment variable in ruby: puts ENV["PATH"]

A collection of useful superglobals # location of website inside our computer echo $_SERVER["DOCUMENT_ROOT"]; echo "<br>"; echo $_SERVER["PHP_SELF"]; # i.e index.php echo "<br>"; echo ...