PHP File Handling Functions

            
 

            

        

          

          
          

          

              

                  
              

          









    
Code for getting input from a form and writing data to a file

    
 
      <!--Writing to a simple file using fwrite-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>File Handling using PHP</title>
</head>
<body>
  <form action="test.php" method="post" enctype="multipart/form-data">
   <label for="regnumber">Enter your Registration Number</label> 
   <input type="text" required name="regnumber" id="regnumber"> <br>
   <label for="Name">Enter your Name</label> 
   <input type="text" required name="username" id="username"> <br>
   <label for="comments">Enter your Comments</label> <br>
   <textarea name="comments" id="comments" cols="30" rows="10"></textarea> <br>
   <input type="submit" name="submit" value="submit"> 
  </form>
<?php
   if(isset($_POST['submit']))
   {
       $regnumber = $_POST['regnumber'];
       $username = $_POST['username'];
       $comments = $_POST['comments'];

       $myfile = fopen("satish.txt","w") or die("Cant open the file");
       $txt=$regnumber.$username.$comments;
       fwrite($myfile,$txt);
       fclose($myfile);

   }
?>
</body>
</html>
    


    
Output

        



 







    
Code for getting input from a form and appending data to a file

    
 
      <!--appending to a simple file using fwrite-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>File Handling using PHP</title>
</head>
<body>
  <form action="test.php" method="post" enctype="multipart/form-data">
   <label for="regnumber">Enter your Registration Number</label> 
   <input type="text" required name="regnumber" id="regnumber"> <br>
   <label for="Name">Enter your Name</label> 
   <input type="text" required name="username" id="username"> <br>
   <label for="comments">Enter your Comments</label> <br>
   <textarea name="comments" id="comments" cols="30" rows="10"></textarea> <br>
   <input type="submit" name="submit" value="submit"> 
  </form>
<?php
   if(isset($_POST['submit']))
   {
       $regnumber = $_POST['regnumber'];
       $username = $_POST['username'];
       $comments = $_POST['comments'];

       $myfile = fopen("satish.txt","a") or die("Cant open the file");
       $txt=$regnumber.$username.$comments;
       fwrite($myfile,$txt);
       fclose($myfile);

   }
?>
</body>
</html>
    


    
Output

        



 






    
Reading from a file and displaying the data to the user.

    
 
      <!--reading data from an existing file-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>File Handling using PHP</title>
</head>
<body>
  <form action="test.php" method="post" enctype="multipart/form-data">
   
  <label for="regnumber">Click on view contents to read the contents from the file</label>
  <input type="submit" name="submit" value="View Contents">

   
  </form>
<?php
   if(isset($_POST['submit']))
   {
       $myfile = fopen("satish.txt","r") or die("Cant open the file");
       $txt= fread($myfile,filesize("satish.txt"));
       echo $txt;
       fclose($myfile);
   }
?>
</body>
</html>
    


    
Output

        



 






    
Code demonstrating file handling methods

    
 
      <?php
       $myfile = fopen("satish.txt","r") or die("Cant open the file");
       if(file_exists("satish.txt"))
       {
         echo "File already Exists"."<br>";
       }
       if(is_readable("satish.txt"))
       {
         echo "file is readable"."<br>";
       }
       echo basename("C:\xampp\htdocs\iwp\satish.txt"."<br>");
       echo dirname("C:\xampp\htdocs\iwp\satish.txt");echo "<br>";
       echo fgetc($myfile); echo "<br>";
       echo fgets($myfile);echo "<br>";
       echo filesize("satish.txt");echo "<br>";
       echo filetype("satish.txt");echo "<br>";
       $text = file_get_contents("satish.txt");
      copy("satish.txt","satishcopy.txt");
      // unlink("satishcopy.txt"); //will delete the file
       echo $text;echo "<br>";
       fseek($myfile,4);
       echo fgets($myfile);
?>
    


    
Output