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                                    fwrite

   (PHP 3, PHP 4 )
   fwrite -- Binary-safe file write

Description

   int fwrite ( resource handle, string string [, int length])

   fwrite() writes the contents of string to the file stream pointed to
   by handle. If the length argument is given, writing will stop after
   length bytes have been written or the end of string is reached,
   whichever comes first.

   fwrite() returns the number of bytes written, or FALSE on error.

   Note that if the length argument is given, then the
   magic_quotes_runtime configuration option will be ignored and no
   slashes will be stripped from string.

     Note: On systems which differentiate between binary and text files
     (i.e. Windows) the file must be opened with 'b' included in fopen()
     mode parameter.

   Example 1. A simple fwrite example
   <?php
   $filename = 'test.txt';
   $somecontent = "Add this to the file\n";
   // Let's make sure the file exists and is writable first.
   if (is_writable($filename)) {
       // In our example we're opening $filename in append mode.
       // The file pointer is at the bottom of the file hence
       // that's where $somecontent will go when we fwrite() it.
       if (!$handle = fopen($filename, 'a')) {
            echo "Cannot open file ($filename)";
            exit;
       }
       // Write $somecontent to our opened file.
       if (!fwrite($handle, $somecontent)) {
           echo "Cannot write to file ($filename)";
           exit;
       }

       echo "Success, wrote ($somecontent) to file ($filename)";

       fclose($handle);

   } else {
       echo "The file $filename is not writable";
   }
   ?>

   See also fread(), fopen(), fsockopen(), popen(), and fputs().
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