(PHP 5 >= 5.1.0, PHP 7)
SplFileObject::ftell — Return current file position
Returns the position of the file pointer which represents the current offset in the file stream.
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Returns the position of the file pointer as an integer, or FALSE on error.
Example #1 SplFileObject::ftell() example
<?php
$file = new SplFileObject("/etc/passwd");
// Read first line
$data = $file->fgets();
// Where are we?
echo $file->ftell();
?>