html - php variable not working in a heredoc -

i wrote heredoc 3 weeks ago working great, , until today used 5 php variables.
here heredoc:

   echo <<<itemdetails_heredoc    <img src="$sitepath/images/logo-landing2.png" />       <form action="$thisfilename" method="post" name="arti-form" id="arti-formid">       <label style="display: inline-block; width: 140px">owner name:</label><input type="text" style="width: 300px"             id="ownerid" name="ownername" readonly="readonly" value="$theloggedinuser" /><br />         <label style="display: inline-block; width: 140px">the item:</label><input type="text"  style="width: 300px"            readonly="readonly" id="itemnameid" name="itemname" value="$itemname" /><br />       <label style="display: inline-block; width: 140px">link:</label><input type="text"  style="width: 300px"            readonly="readonly" id="itemlinkid" name="link" value="$thelinkid" /><br />       <label style="display: inline-block; width: 140px">era:</label><input type="text"  style="width: 70px"               readonly="readonly" id="itemeraid" name="itemera" value="$itemera" /><br /> itemdetails_heredoc; 

there 6 (6) php variables in above heredoc. first 1 ($sitepath) not work. added today.

for reason, server not replacing '$sitepath' (the first php variable in heredoc) correctly because when browser receives above page, error generated:

  notice: undefined variable: sitepath in c:\xampp\htdocs\arti-facks\showitem.php on line 221 

here 5 php variables have been in heredoc , working fine 3 weeks -- being correctly replaced values before html sent browser:

• $thisfilename
• $theloggedinuser
• $itemname
• $thelinkid
• $itemera

just how know above php variables being correctly resolved on server, associated values being put heredoc sent browser?

simple -- 'view page source' , instead of seeing '$thisfilename', or '$itemname', etc. in html code sent server -- instead see associated values in above heredoc html.

for example, page source shows me '$thisfilename' in heredoc got correctly resolved "showitem.php."

my '$sitepath' declared in global include file called "globals.php" , in file, $sitepath declared this:

  $sitepath = "http://localhost/arti-facks"; 

and @ top of showitem.php have had, past 3 weeks, include statement pull in globals.php:

  require_once 'globals.php'; // variables , statics used throughout 

so today added $sitepath declaration (above) inside of globals.php

to prove showitem.php able 'see' newly-declared $sitepath added globals.php, echo variable -- sure enough, showitem.php 100% able 'see' newly-declared $sitepath.

and yet -- despite -- , despite 3 weeks of using above heredoc 5 other php variables -- heredoc not getting $sitepath.

when 'view page source' here's see $sitepath line of heredoc above:

    <img src="/images/logo-landing2.png" />    

you can see $sitepath part before /images/logo-landing2.png blank or missing.

why have i, 3 solid problem-free weeks, been getting 5 successfully-resolved php variables in above heredoc, yet add 6th php variable today , it's if

   "goodness, quota php variables in heredoc there maxed out     @ 5.  , see you're trying use 6th php variable -- thinking." 

since heredoc called inside function, global variable $sitepath not in scope. @ top of function, use global keyword:

function yourfunction() {   global $sitepath;    // build heredoc } 

or use $globals array inside heredoc:

echo <<<itemdetails_heredoc    <img src="{$globals['sitepath']}/images/logo-landing2.png" />       <form action="$thisfilename" method="post" name="arti-form" id="arti-formid">       ...snip...  itemdetails_heredoc; 

most prefereable: function parameter

or preferable above either option, pass $sitepath variable functions need parameter.

function yourfunction($sitepath) {   // $sitepath in scope without    // reaching global namespace }