Condense the system commands into fewer slides, focusing on what they return and good use cases. Fixes #5

Author: stevegrunwell

slides/exec.md

@@ -35,11 +35,8 @@
         "argc.md",
         "args.md",
         "system-commands.md",
-        "exec.md",
-        "shell_exec.md",
-        "shell_exec2.md",
-        "system.md",
-        "passthru.md",
+        "system-commands2.md",
+        "system-commands3.md",
         "escaping-shell-commands.md",
         "escapeshellcmd.md",
         "escaping-arguments.md",

slides/list.json

@@ -0,0 +1,16 @@
+#### Executing System Commands
+
+<dl>
+	<dt class="fragment" data-fragment-index="0"><code>exec()</code></dt>
+	<dd class="fragment" data-fragment-index="0">Returns the last line of output as a string.</dd>
+	<dt class="fragment" data-fragment-index="1"><code>shell_exec()</code></dt>
+	<dd class="fragment" data-fragment-index="1">returns <strong>full</strong> output as a string.</dd>
+	<dd class="fragment" data-fragment-index="2">Can also be represented using the backtick operator:
+		<pre><code class="lang-php">\`ls -al` === shell_exec('ls -al')</code></pre>
+	</dd>
+</dl>
+
+
+Note:
+
+If you require multiple lines of output, use shell_exec()

slides/passthru.md

@@ -0,0 +1,14 @@
+#### (Even More) System Commands
+
+<dl>
+	<dt class="fragment" data-fragment-index="0"><code>system()</code></dt>
+	<dd class="fragment" data-fragment-index="0">Flush the output buffer after each line</dd>
+	<dt class="fragment" data-fragment-index="1"><code>passthru()</code></dt>
+	<dd class="fragment" data-fragment-index="1">Returns the raw output.</dd>
+	<dd class="fragment" data-fragment-index="2">Great for working with binary files or interactive output</dd>
+</dl>
+
+
+Note:
+
+If you require multiple lines of output, use shell_exec()