html

# image resize
# aspect ratio is not preserved by default if you only 
# specify one of width or height
style="width:500px;height:600px;"

# degree symbol
&deg

# justify text in paragraph
<p align="justify"> 

# change size of table
<table style="width:100%" > 

# center an item
<center> </center>

# comments in html
<!-- content -->

# css padding
top right bottom left
if left is missing assumed to be zero

# blocks side by side css
float:left;

# embed a link
<a href=\path> "Text to show </a>

# embed php
<?php
$txt1 = "learn php";
$txt2 = "w3schools.com";
$x = 5;
$y = 4;

print "<h2>" . $txt1 . "</h2>";
print "study php at " . $txt2 . "<br>";
print $x + $y;

$image_folder = "daily_images";
$file_type = ".jpg";
$today = date('l');
$image_name = $today . $file_type;
print "expected image path: $image_name<br>";

print "<img src=\"$image_folder/$image_name\" alt=\"put some text here\" />";

?>