PHP feof () function Read File usage

Source: Internet
Author: User

(PHP 4, PHP 5)

feof-the test file pointer to the end of the file

If the server does not close the connection that was opened by Fsockopen (), feof () will wait until the timeout returns true. The default time-out limit is 60 seconds, and you can use Stream_set_timeout () to change this value.

The file pointer must be valid and must point to a file that was successfully opened by fopen () or fsockopen () and not yet closed by fclose ().

If an invalid file pointer is passed, it may fall into an infinite loop because EOF does not return TRUE.

Example #1 feof () example using an invalid file pointer

<?php
If the file is unreadable or does not exist, the fopen function returns FALSE
$file = @fopen ("No_such_file", "R");

FALSE from fopen emits a warning message and gets stuck in an infinite loop here.
while (!feof ($file)) {
}

Fclose ($file);
?>


Example

<?php
$file = fopen ($_server[' document_root '). " /me/test.txt "," R ");

Prints all the lines in the text until the end of the file.
while (! feof ($file))
{
Echo fgets ($file). "<br/>";
}

Fclose ($file);
?>

Output:

Hello, this is a test file.
There are three lines here.
This is the last line.

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