feof
(PHP 4, PHP 5)
feof — Tests for end-of-file on a file pointer
說明
bool feof
( resource $handle
)
Tests for end-of-file on a file pointer.
Return值
Returns TRUE if the file pointer is at EOF or an error occurs (including socket timeout); otherwise returns FALSE.
註釋
Warning
If a connection opened by fsockopen() wasn't closed by the server, feof() will wait until a timeout has been reached to return TRUE. The default timeout value is 60 seconds. You may use stream_set_timeout() to change this value.
Warning
If passed file pointer is not valid you may get an infinite loop, because EOF fails to return TRUE.
Example#1 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);
?>