Reading from a dynamically decided line number

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LEARN ABOUT PHP

fgets

FGETS(3)								 1								  FGETS(3)

fgets - Gets line from file pointer

SYNOPSIS

       string fgets (resource  $handle, [int  $length])

DESCRIPTION

	Gets a line from file pointer.

PARAMETERS

	      o $handle
		-The  file  pointer must be valid, and must point to a file successfully opened by fopen(3) or fsockopen(3) (and not yet closed by
		fclose(3)).

	      o $length
		- Reading ends when $length - 1 bytes have been read, or a newline (which is included in the return value), or an  EOF	(whichever
		comes first). If no length is specified, it will keep reading from the stream until it reaches the end of the line.

	      Note

		      Until  PHP  4.3.0, omitting it would assume 1024 as the line length. If the majority of the lines in the file are all larger
		     than 8KB, it is more resource efficient for your script to specify the maximum line length.

RETURN VALUES

	Returns a string of up to $length - 1 bytes read from the file pointed to by $handle. If there is  no  more  data  to  read  in  the  file
       pointer, then FALSE is returned.

	If an error occurs, FALSE is returned.

CHANGELOG

       +--------+-----------------------------+
       |Version |			      |
       |	|			      |
       |	|	  Description	      |
       |	|			      |
       +--------+-----------------------------+
       | 4.3.0	|			      |
       |	|			      |
       |	| fgets(3) is now binary safe |
       |	|			      |
       +--------+-----------------------------+
EXAMPLES

       Example #1

	      Reading a file line by line

	      <?php
	      $handle = @fopen("/tmp/inputfile.txt", "r");
	      if ($handle) {
		  while (($buffer = fgets($handle, 4096)) !== false) {
		      echo $buffer;
		  }
		  if (!feof($handle)) {
		      echo "Error: unexpected fgets() fail
";
		  }
		  fclose($handle);
	      }
	      ?>

NOTES

       Note

	      If  PHP  is  not properly recognizing the line endings when reading files either on or created by a Macintosh computer, enabling the
	      auto_detect_line_endings run-time configuration option may help resolve the problem.

       Note

	       People used to the 'C' semantics of fgets(3) should note the difference in how EOF is returned.

SEE ALSO

       fgetss(3), fread(3), fgetc(3), stream_get_line(3), fopen(3), popen(3), fsockopen(3), stream_set_timeout(3).

PHP Documentation Group 														  FGETS(3)

Shell Programming and Scripting