08c07-1.php
来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 51 行
PHP
51 行
<?php// Don't allow this page to be cached, since it should always be fresh.header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>Tail of logfile</title></head><body><pre><?php// Open the file we wish to read - In this case the access log of our serverif (!($fp = fopen("/var/log/apache2/access.log", 'r'))) { // We couldn't open the file, error! echo "ERROR: Could not open file for reading!\n"; exit();}// We don't want to display the entire file, it could be huge, so // let's use a quick way to just display some of the file. Use fseek// to head to the end of the file, but back up by 500 bytes.fseek($fp, -500, SEEK_END);// Read one line of data to throw away, as it may be an incomplete// line due to our seek.fgets($fp);// Keep looping foreverfor (;;) { // We can begin to loop through reading all lines and echoing them: while (!feof($fp)) { if ($line = fgets($fp)) { echo $line; } } // Ok, we hit the end of the file, there are a few odd-n-ends we need: // First reseek to the end of the file, this is necessary to reset // the filepointer, else it won't read anything else. fseek($fp, 0, SEEK_END); // Secondly flush the output buffers so that all text appears: flush(); // Also reset the time limit for PHP so that we never time out: set_time_limit(15); // Now sleep for 1 second, and then we will try to access it again. sleep(1);}?></pre></body></html>⌨️ 快捷键说明
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