feof

(PHP 4, PHP 5, PHP 7)

feofTests for end-of-file on a file pointer

Descrierea

feof ( resource $handle ) : bool

Tests for end-of-file on a file pointer.

Parametri

handle

Indicatorul fișierului trebuie să fie valid și trebuie să indice la un fișier deschis cu succes cu ajutorul fopen() sau fsockopen() (și să nu fie închis cu fclose()).

Valorile întoarse

Returns TRUE if the file pointer is at EOF or an error occurs (including socket timeout); otherwise returns FALSE.

Note

Avertizare

If a connection opened by fsockopen() wasn't closed by the server, feof() will hang. To workaround this, see below example:

Example #1 Handling timeouts with feof()

<?php
function safe_feof($fp, &$start NULL) {
 
$start microtime(true);

 return 
feof($fp);
}

/* Assuming $fp is previously opened by fsockopen() */

$start NULL;
$timeout ini_get('default_socket_timeout');

while(!
safe_feof($fp$start) && (microtime(true) - $start) < $timeout)
{
 
/* Handle */
}
?>

Avertizare

If the passed file pointer is not valid you may get an infinite loop, because feof() fails to return TRUE.

Example #2 feof() example with an invalid file pointer

<?php
// if file can not be read or doesn't exist fopen function returns FALSE
$file = @fopen("no_such_file""r");

// FALSE from fopen will issue warning and result in infinite loop here
while (!feof($file)) {
}

fclose($file);
?>