Control structures like if/else statements, for loops, and switch cases are vital to writing program logic. These code snippets will serve as easy references for these control structures when writing with the Tcl programming language
There are many situations where it is useful to ask the user for some information while a program is running. Tcl makes this a breeze. Check out these code snippets that demonstrate how to interact with the user and manipulate input.
Tcl programs can accept command line arguments to pass runtime variables. These code examples show how to make use of these arguments.
Tcl provides an easy way to open and read the lines of a file. Check out these code snippets that demonstrate how to read and write files with Tcl programming language.
Tcl is a language similar Bash because every line is a command and it can be scripted similar to shell scripts. Tcl can be used by itself but it typically embedded inside larger applications. Tcl with Tk toolkit allows you to create GUI applications. Once nice thing about Tcl/Tk is that it is widely available and works on multiple platforms. It does not create the nicest looking GUIs because it does not use native windows, but they are effective. Let's look at the most basic Hello World program. Let's name it hello.tcl.
PHP/TK implements object oriented bindings for TCL/TK that can be used to create GUI applications. It only works on Unix systems. PHP must be configured to allow dynamic linking with enable_dl = On in the php.ini. The shared object file (tk.so) can be downloaded manually from PECL. The shared object file goes inside your php modules folder which is typically something like /usr/lib/php/modules. Look for the folder with other .so files or refer to your particular distribution documentation.