how to open a pdf link in php code example

Example 1: open pdf file in browser php

<?php
    // Store the file name into variable
    $file = 'filename';
    $filepath = "https://www.example.com/".$file;
    // Header content type
    header("Content-type: application/pdf");
    // Send the file to the browser.
    readfile($filepath);

Example 2: upload pdf file in php

<html>
<head>
<title>  FORM </title>
</head>
<body align="left">
<h1> FILE UPLOAD </h1>

<form action = "term5b.php" method = "POST" enctype="multipart/form-data"/>

    <input type = "file" name = "fileupload"/></br>  
    <input type = "submit" name = "opt" value = "upload"/></br> </br>  

</form>
</body>
</html>







<?php
   $target_dir="E:\ ";
   $filename=$_FILES["fileupload"]["name"];

   $tmpname=$_FILES["fileupload"]["tmp_name"];
   $filetype=$_FILES["fileupload"]["type"];
   $errors=[];
   $fileextensions=["pdf"];
	$arr=explode(".",$filename);
   $ext=strtolower(end($arr));

   $uploadpath=$target_dir.basename($filename);
if(! in_array($ext,$fileextensions))
   {
     $errors[]="Invalid filename";
   }
   if(empty($errors))
   {
     if(move_uploaded_file($tmpname,$uploadpath))
     {
       echo "file uploaded successfully";
     }
     else
     {
       echo "not successfull";
     }
   }
   else
   {
      foreach($errors as $value)
      {
         echo "$value";
      }
   }
?>

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