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I have been studing php using a book named Wrox PHP. So far I have had alot of trouble getting the code to work. I have had to us work arounds to get the results I am suppose to get. Here is the code the way it is in the book: " <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Circle Properties</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> <meta http-equiv="content-type" content="application/xhtml+xml; charset=UTF-8"/> <meta http-equiv="content-style-type" content="text/css"/> <link href="common.css" rel="stylesheet" type="text/css"/> </head> <body> <?php $radius = 4; $diameter = $radius * 2; $circumference = M_PI * $diameter; $area = M_PI * pow($radius, 2); echo "This circle has...<br />"; echo "A radius of " . $radius . "<br />"; echo "A diameter " . $diameter . "<br />"; echo "A circumference of " . $circumference . "<br />"; echo "An area of " . $area . "<br />"; <div class="logos"> <p><a href="http://httpd.apache.org/"><img src="/icons/apache_pb2.gif" alt="[ Powered by Apache ]"/></a> </div> </body> </html> Here is what works: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd$ <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Circle Properties</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> <meta http-equiv="content-type" content="application/xhtml+xml; charset=UTF-8"/> <meta http-equiv="content-style-type" content="text/css"/> <link href="common.css" rel="stylesheet" type="text/css"/> </head> <body> <?php $radius = 4; $diameter = $radius * 2; $circumference = M_PI * $diameter; $area = M_PI * pow( $radius, 2); echo "This circle has...<br />"; echo "A radius of "; echo $radius; echo "<br /> A diameter of "; echo $diameter; echo "<br /> A circumference of "; echo $circumference; echo "<br /> An area of "; echo $area; ?> <p><a href="http://httpd.apache.org/"><img src="/icons/apache_pb2.gif" alt="[ Powered by Apache ]"/></a> </body> </html> Does the book version look ok to anyone else? What is wrong? Should I abandon the book and get a better one some one knows about?
