使用php编写代码块时，会忽略页面上的php$变量.解决方案，任何人 - When writing block of code with php, php $variables on the page are ignored. Solution, anyone?

我正试图将一个变量嵌入到我用php编写的代码块中的文本区域中，这样它就可以很容易地选择并复制到另一个网站。在生产中，变量将从SESSION变量中提取，但为了让您能够尝试将其粘贴到页面上，我已经硬连接了变量值。

问题是php函数没有拾取变量。我已经在写页面之前就已经存在的SESSION变量中尝试过了——不可以。我还尝试将变量加载到页面上的表单中，并通过$_POST获取它们。。。不行。我在这里做错了什么？

<?php session_start();
$fkey ="46"; 
$bleft = "0.86543";
$bpos = "tp";
$bcolor = "#eb9494";
$blabel = "CALL US";
echo "fkey:  " . $fkey . "<br/>" ; 
echo "bleft:  " .$bleft . "<br/>" ;
echo "bpos:  " .$bpos . "<br/>" ; 
echo "bcolor:  " .$bcolor . "<br/>" ; 
echo "blabel:  " .$blabel . "<br/>" ; 

      $updateGoTo = null;
  switch ($thepos) {
    case "tp":
  $updateGoTo = "slideouttesttopDATA.php";
  build_HTMLtp();
  break;    
case "bt":
         $updateGoTo ="slideouttestbtmDATA.php";
      build_HTMLbt();
      break; 
     case "lt":
           $updateGoTo = "slideouttestltDATA.php";
        build_HTMLlt();
  break; 
case "rt":
       $updateGoTo = "slideouttestrtDATA.php";
        build_HTMLrt();
  break; 
   }
  ?>
<html>
<body>
    <form action="myform" method="post" enctype="application/x-www-form-urlencoded">
<?php 
function build_HTMLtp() {
    $myfield="&lt;style&gt;'n";
    //style blocks
    $myfield.=
"#slideouttop:{
    position:absolute;
    width:190px;height:187px;
    top:-238px;
    left:50%%;
}
.bizzopop,.bizzopopbtm{
    background:url(http://dev.bizzocall.com/images/bcpopupwtrans.png);
    background-repeat:no-repeat;
    height:auto;
    width:201px;
    overflow:visible;
    min-height:237px;
}
#clickmetop,#clickmebtm {
    float:left;
    clear:left;
    height:20px;
    width:80px;
}
#bcbuttontop,#bcbuttonbtm{
    background-color:#000000;
    position:relative;
    cursor:pointer;
    float:left;
    clear:left;
    left:0;
    height:30px;
    width:140px;
    overflow:hidden;
}
.bcsquarebtntop,.bcsquarebtnbtm{
    position:relative;
    background-color:#000000;
    float:left;
    clear:left;
    border:#ffFFFF;
    width:15px;
    height:15px;
    border-width:2px;
    border-style:solid;
    left:6px;
    top:5px;
}
.innersquarebtn{
    background-color:#ffffff;
    width:3px;
    height:3px;
    margin:auto;
    margin-top:6px;
    position:relative;  
}
.btnlabeltxttop{
    cursor:pointer;
    display:inline;
    overflow:visible;
    height:40px;
    width:100%%;
    text-align:left;
    text-indent:0;
    left:0px;
    position:relative;
    float:left;
    font-size:17px;
    font-weight:bold;
    color:#00FFFF;
    top:-23px;
    margin-left:32px;
}'n";
//special handling for variables
$myfield.=".bizzopop {background-color:" . $bcolor . ";}'n";
$myfield.=".btnlabeltxttop {color:". $bcolor .";}'n";
$myfield.="#slideouttop {
    left:". 100*($bleft) ."%%;
    display:". $tp .";
}
    #clickmetop {
    position:relative;
    float:left;
    clear:left;
    height:20px;
    width:80px;
    z-index:1000;
}
&lt;/style&gt;'n'n";
//now the html
$myfield.= "<div id='"slideouttop'">
<div class='"bizzopop'">
</div>
 <div id='"clickmetop'">
<div id='"bcbuttontop'">
  <div class='"bcsquarebtntop'">
    <div class='"innersquarebtn'"></div>
  </div>
  </div>
  <div class='"btnlabeltxttop'">". $blabel ."</div>
</div>
</div>'n'n";
//jquery handlers
$myfield.="<script src=" . "'"http://" . "code.jquery.com/jquery-latest.js'">        </script>'"'n
$(function() {'n
    $(''#clickmetop').toggle(function() {'n
        $(this).parent().animate({marginTop:''187px''}, {queue:false, duration:     500});'n
    }, function() {'n
        $(this).parent().animate({marginTop:''0px''}, {queue:false, duration:     500});'n
    });'n
});'n
</script>
";
  printf ($myfield);
}
?>
<textarea name="myfield" cols="100" rows="30"><?php build_HTMLtp();?>
</textarea>
</form>

全局变量在函数内部不可访问，除非您使用Global或通过$GLOBALS-数组访问它们。