The rewind Function
The rewind function resets the file pointer to the beginning.
This is useful when you need to reread a file or
return to its beginning after some operations.
The function takes one parameter - a file pointer,
returned by the fopen function.
Syntax
rewind(resource $handle);
Example
Reset the file pointer after reading the first line:
<?php
$file = fopen('test.txt', 'r');
echo fgets($file); // Read first line
rewind($file); // Reset pointer
echo fgets($file); // Read first line again
fclose($file);
?>
Code execution result:
'First line'
'First line'
Example
Try to read the file twice without rewind:
<?php
$file = fopen('test.txt', 'r');
echo fread($file, filesize('test.txt'));
echo fread($file, filesize('test.txt'));
fclose($file);
?>
Code execution result:
'File content'
''
