PHP/File Directory/file function

file.php

   <source lang="html4strict">

<?php

  $users = file("data.txt");
  foreach ($users as $user) {
     list($name, $email) = explode(" ", $user);
     $email = trim($email);
     echo "<a href=\"mailto:$email\">$name</a> 
\n";
  }

?>

 </source>
   
  

PHP File Logic Functions

   <source lang="html4strict">

is_dir() Determines if the file is a directory.

is_executable() Determines if the file is executable by PHP.

is_file() Determines if the filename is an actual file or a symbolic link to a file (returns true if a real file).

is_link() Determines if the file is a symbolic link or an actual file (opposite of is_file()).

is_readable() Determines if PHP is able to read from the given file.

is_uploaded_file() Determines if the given file was uploaded to the server via the Web server.

is_writeable() Determines if PHP is able to write to the given file.

file_exists() Determines if the given file exists.

 </source>
   
  

Reading a File into an Array

   <source lang="html4strict">

file() function reads the entire contents of a file into an indexed array. Its syntax is: array file (string file [, int use_include_path]) If use_include_path is set to 1, then the file is searched along the include path in the php.ini file. <? $file_array = file( "data.txt" ); while ( list( $line_num, $line ) = each( $file_array ) ) :

    print "Line $line_num: " . htmlspecialchars( $line ) . "
\n";

endwhile; ?>

 </source>