PHP feof() Function

The PHP feof() function stands for file end-of-file, used to check whether the file pointer has been reached to the end of the file. For example:

<?php
   $fp = fopen("codescracker.txt", "r");
   while(!feof($fp))
   {
      $line = fgets($fp);
      echo $line;
      echo "<br>";
   }
   fclose($fp);
?>

The output produced by above PHP example, is:

Note - The fopen() opens a file.

Note - The fgets() used to read the content of a file, line-by-line.

Note - The fclose() closes a file.

The text, you are seeing as the output, is the same text, that are available in the file codescracker.txt. Here is the snapshot of the opened file, available in current directory:

Note - The feof() function in PHP, is used to go through all the data using loop. This becomes useful, when you do not know the size of the file, but still have to read the whole content.

In above example, the following PHP code:

while(!feof($fp))

indicates that the loop continues its execution, until the file whose pointer is $fp reached to the end of the file.

PHP feof() Syntax

The syntax of feof() function in PHP, is:

feof(filePointer)

PHP feof() Example | Read File until eof

Now let me create the modified version of above example, since above example only works if the file exists. And if the file does not available in the current directory, then that example will not work. Here is the modified version of that example:

<?php
   $fp = @fopen("codescracker.txt", "r");
   if($fp)
   {
      while(!feof($fp))
      {
         $line = fgets($fp);
         echo $line;
         echo "<br>";
      }
      fclose($fp);
   }
   else
      echo "<p>Unable to open the file!</p>";
?>

Note - The @ before the fopen() function, used to hide the default error message produced by the function, when the file does not exists.

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