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 PHP manuál : function.ftell.html

ftell
PHP Manual
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ftell

(PHP 3, PHP 4, PHP 5)

ftell -- Tells file pointer read/write position

Description

int ftell ( resource handle )

Returns the position of the file pointer referenced by handle; i.e., its offset into the file stream.

If an error occurs, returns FALSE.

The file pointer must be valid, and must point to a file successfully opened by fopen() or popen(). ftell() gives undefined results for append-only streams (opened with "a" flag).

Example 1. ftell() example

<?php

// opens a file and read some data
$fp = fopen("/etc/passwd", "r");
$data = fgets($fp, 12);

// where are we ?
echo ftell($fp); // 11

fclose($fp);

?>

See also fopen(), popen(), fseek(), and rewind().

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