adding all php files

php/crash_course_cpp_syntax.php

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+<?php include 'global_colors.php'; ?>
+<style>
+.crash_course_in_cpp-selected {
+    background-color: var(--sidebar-highlight-color);
+    font-weight: bold;
+    color: #000000;
+}
+
+.crash_course_in_cpp-selected .icon-title {
+    background-color: var(--sidebar-highlight-color);
+    font-weight: bold;
+    color: #000000;
+}
+</style>
+
+<?php include 'template_before_crash_course.php'; ?>
+
+<h1>Crash Course in C++ Syntax</h1>
+
+<p class=DS_P>
+We have developed a set of lessons on Submitty that
+aim to transition you from another programming language to C++.  These
+exercises are targeted to students who've successfully completed
+Computer Science 1 at RPI and learned Python, or students who earned
+college credit for the Computer Science AP Test in Java, or students
+who have done other formal coursework in or self-taught Introductory
+Programming.
+</p>
+
+<p class=DS_P>
+<a href="https://submitty.cs.rpi.edu/courses/f23/csci1199">https://submitty.cs.rpi.edu/courses/f23/csci1199</a>
+<br>
+<em>All Students registered for CSCI 1200 Data Structures, Fall 2023
+have been added to this second (not for credit, not for a grade)
+Submitty course.  Contact the instructor if you do not have
+access.</em>
+</p>
+
+<p class=DS_P>
+The problems were designed by members of the teaching staff with years
+  of experience working one-on-one with Data Structures students and
+  highlight some of the common C++ syntax that trip up new C++
+  programmers.  We recommend you read through the material and work
+  through the problems during the first week or two of Data
+  Structures.  However, note that <em>these exercises are completely
+  optional and will not be used to compute your final grade in Data
+  Structures.</em>
+</p>
+
+<p class=DS_P>
+Some of these exercises are rather subtle.  You many need to study the
+code carefully to spot the differences.  Carefully reading code is an
+essential skill for all programmers.  If a specific problem has
+stumped you, please ask a member of the teaching staff in office
+hours.
+</p>
+
+<p class=DS_P>
+Note: The exercises in the Crash Course for C++ Syntax
+are <b><em>NOT</em></b> typical of the problems you will see on the
+Data Structures tests and the final exam.  The Data Structures test
+questions will not focus on "tricks" of C++ syntax, but rather on bigger
+picture, fundamental concepts of Data Structures theory and practice.
+</p>
+
+
+<p class=DS_P>
+  <b><em>
+      Be sure to click through the other pages linked on the left sidebar menu.
+      </em></b>
+</p>
+
+
+<?php include 'template_after.php'; ?>