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--- php_first_lesson [2024/10/04 06:59] – appledog
+++ php_first_lesson [2024/10/04 07:10] (current) – appledog
@@ Line 3: / Line 3: @@
 This page is a record of what Roger and I were able to accomplish in the first lesson. Charles was there too, but he was fated to drop out because he could not type very fast.
-== 1. Hello World
+A big question could be, "Why PHP?" Well, PHP has an easy syntax and is extremely useful for web-based programming. It's a great starter, with better syntax than Python. And, why not? PHP has it's own local server, so it's easy for anyone to use. You can just use a text editor. Its oldschool! A great start for the serious. And so, we began.
+== 1. Hello World with echo()
 Run this. What does it do? What is ECHO?
@@ Line 12: / Line 14: @@
 </Code>
-=== echo.php
+=== For the record
+Quoting slashes.
+<Code:PHP>
+<?php
+	echo "echo \"Hello, world!\\n\";";
+?>
+</Code>
+=== ex.2 echo.php
 Another example.
@@ Line 23: / Line 36: @@
 </Code>
-== 2. roger.php
+=== ex.3 roger.php
 <Code:PHP>
 <?php
@@ Line 32: / Line 45: @@
 </Code>
+=== ex. 4 box.php
+We can draw art. Can you make a triangle?
+<Code:PHP>
+<?php
+	echo "*****\n";
+	echo "*   *\n";
+	echo "*   *\n";
+	echo "*   *\n";
+	echo "*****\n";
+?>
+</Code>
+=== ex. 5 dinosaur.php
+More art. This is fun! I think, this was a homework question (draw a dinosaur).
+<Code:PHP>
+<?php
+	echo "               __\n";
+	echo "              / _)\n";
+	echo "     _.----._/ /\n";
+	echo "    /         /\n";
+	echo " __/ (  | (  |\n";
+	echo "/__.-'|_|--|_|\n";
+?>
+</Code>
+=== ex. 6 triceratops.php
+Oh, this was the homework question. Anyways, note the quoting slashes.
+<Code:PHP>
+<?php
+	echo "                        . - ~ ~ ~ - .\n";
+	echo "      ..     _      .-~               ~-.\n";
+	echo "     //|     \\ `..~                      `.\n";
+	echo "    || |      }  }              /       \\  \\\n";
+	echo "(\\   \\\\ \\~^..'                 |         }
+\\\n";
+	echo " \\`.-~  o      /       }       |        /    \\\n";
+	echo " (__          |       /        |       /      `.\n";
+	echo "  `- - ~ ~ -._|      /_ - ~ ~ ^|      /- _      `.\n";
+	echo "              |     /          |     /     ~-.     ~- _\n";
+	echo "              |_____|          |_____|         ~ - . _ _~_-_\n";
+?>
+</Code>
+== 2. input with readLine()
+Teacher and Doctor. Here is teacher.php:
+<Code:PHP>
+<?php
+	$name = readLine("What is your name? ");
+	echo "Hello {$name}!\n";
+	echo "Your new name is Teacher {$name}.\n";
+?>
+</code>
+and doctor.php:
+<Code:PHP>
+<?php
+	$name = readLine("What is your name? ");
+	echo "Hello {$name}!\n";
+	echo "Your new name is Dr. {$name}.\n";
+?>
+</Code>
+== 3. decision making with if-then
+<Code:PHP>
+<?php
+	$name = readLine("What is your name? ");
+	if ($name == "vegetables") {
+		echo "I don't like vegetables!\n";
+		exit();
+	} else {
+		echo "Hello {$name}!\n";
+		echo "Your new name is Mr. {$name}.\n";
+	}
+?>
+</Code>