Support for PHP (with solutions)

GNUmakefile

@@ -48,6 +48,13 @@ configuration:
 	@cat test/messages/welcome
 	@false
 
+run/%: %.php configuration
+	@echo === $*: preparing...
+	@$(MAKE) -s check-hashbang/$*.php
+	@mkdir -p run
+	@cp $< $@
+	@chmod +x $@
+
 run/%: %.py configuration
 	@echo === $*: preparing...
 	@$(MAKE) -s check-hashbang/$*.py

README.md

@@ -20,7 +20,7 @@ You might need to run `gmake` on non-GNU or non-Linux systems.
 Current state
 =============
 
-TDLPL currently recognizes two programming languages: Python and Ruby.
+TDLPL currently recognizes two programming languages: Python, Ruby and PHP.
 Adding new languages is really easy: edit the GNUmakefile to add the
 corresponding rule that prepares the runnable file. The runnable file goes
 into the run/ directory. Announce the new supported language in

config-samples/config.php

@@ -0,0 +1,6 @@
+# This is a sample configuration that indicates TDLPL the user is
+# trying to learn PHP.
+
+language PHP
+mimetype text/x-php
+extension php

solutions-php/execute.php

@@ -0,0 +1,2 @@
+#!/usr/bin/php
+

solutions-php/firstarg-int.php

@@ -0,0 +1,4 @@
+#!/usr/bin/php
+<?php
+print $argv[1];
+?>

solutions-php/firstarg.php

@@ -0,0 +1,4 @@
+#!/usr/bin/php
+<?php
+print $argv[1];
+?>

solutions-php/hello.php

@@ -0,0 +1,4 @@
+#!/usr/bin/php
+<?php
+print "hello\n";
+?>

solutions-php/remainder.php

@@ -0,0 +1,4 @@
+#!/usr/bin/php
+<?php
+print $argv[1] % 10;
+?>

solutions-php/square.php

@@ -0,0 +1,4 @@
+#!/usr/bin/php
+<?php
+print $argv[1]*$argv[1];
+?>

solutions-php/twoplustwo.php

@@ -0,0 +1,4 @@
+#!/usr/bin/php
+<?php
+print 2+2;
+?>