(PHP 4, PHP 5, PHP 7)
ftell — �����ļ�ָ���/д��λ��
$handle
) : int
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Returns the position of the file pointer referenced by
handle as an integer; i.e., its offset into the file stream.
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Example #1 ftell() ����
<?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);
?>