File System

So here are the steps required to read a file with PHP.

• Open a file using fopen() function.
• Get the file's length using filesize() function.
• Read the file's content using fread() function.
• Close the file with fclose() function.

$filename = "tmp.txt";
$file = fopen( $filename, "r+" );

if( $file == false )
{
   echo ( "Error in opening file" );
   exit();
}

$filesize = filesize( $filename );
$filetext = fread( $file, $filesize );

fclose( $file );

echo ( "File size : $filesize bytes" );
echo ( "$filetext" );
----------------------------------------------------
PHP Check End-Of-File - feof()

The feof() function checks if the "end-of-file" (EOF) has been reached.
The feof() function is useful for looping through data of unknown length.

The example below reads the "webdictionary.txt" file line by line, until end-of-file is reached:

$myfile = fopen("webdictionary.txt", "r") or die("Unable to open file!");
// Output one line until end-of-file
while(!feof($myfile)) {
  echo fgets($myfile) . "<br>";
}

fclose($myfile);