Bagaimana cara mengajar polyglot bahasa baru?

<?php
...  PHP-
?>

<?php echo "Hello World"; ?>

<?php
    $test =  "Here I am!";
    echo "Hello World. ";
    echo $test;
?>

<?php
if ($a > $b)
  {
  echo "  ";
  }
.   
<?php
for ($a = 11; $a <= 19; $a++)
  {
   echo " $a  ".($a*$a)."<br>";
  }
?>

<?php
$array = array(
    "1"  => "a",
    "2"  => "b",
    "3"  => "c",
    "4"  => "d",
);
?>

<?php
$ourtext="";
$resultarr['A']=0;
$lat_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 

if(isset($_POST['zapros']) and $_POST['zapros']==1){
 echo " .<br />\n";
	if ($file_handle=fopen($_FILES['userfile']['tmp_name'],'r')){
		echo " .<br />\n";
	} 
	
while (!feof($file_handle)) {
   $line = fgets($file_handle);
   $ourtext.=$line;
}

$ourtext=mb_strtoupper($ourtext);

$arrofchars = str_split($ourtext);
	foreach($arrofchars as $j=>$k){
		if (mb_strlen(mb_strstr($lat_chars, $k)) != 0){
				if(array_key_exists($k,$resultarr)){
				$resultarr[$k]++;
					}else{
					$resultarr[$k]=1;
					}
		}		
	}

ksort($resultarr);
$maxvalue=max($resultarr); 
echo "<table class='resulttable'>";
foreach($resultarr as $rk=>$rv){
$perc=round($rv*500/$maxvalue);
echo "<tr><td style='width:30px;'>".$rk."</td><td><div style='width:".$perc."px;background:#ff0000;height:10px;'> </div></td></tr>";
}
echo "</table>";
	
		}
		
		echo "<br />      .txt
		<form name=\"f1\" action=\"\" method=\"post\"  enctype=\"multipart/form-data\">
		<input name=\"zapros\" type=\"hidden\" value=\"1\">
		<input name=\"userfile\" type=\"file\" />
		<input type=\"submit\" value=\"\" />
		</form>\n";

?>