how to store log file and read log file line


 */
class Logging {
    // declare log file and file pointer as private properties
    private $log_file, $fp;
    // set log file (path and name)
    public function lfile($path) {
        $this->log_file = $path;
    }
    // write message to the log file
    public function lwrite($message) {
        // if file pointer doesn't exist, then open log file
        if (!$this->fp) {
            $this->lopen();
        }
        // define script name
        $script_name = pathinfo($_SERVER['PHP_SELF'], PATHINFO_FILENAME);
        // define current time and suppress E_WARNING if using the system TZ settings
        // (don't forget to set the INI setting date.timezone)
        $time = @date('[d/M/Y:H:i:s]');
        // write current time, script name and message to the log file
        fwrite($this->fp, "$time ($script_name) $message" . PHP_EOL);
    }
    // close log file (it's always a good idea to close a file when you're done with it)
    public function lclose() {
        fclose($this->fp);
    }
    // open log file (private method)
    private function lopen() {
        // in case of Windows set default log file
        if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
            $log_file_default = 'c:/php/logfile.txt';
        }
        // set default log file for Linux and other systems
        else {
            $log_file_default = '/tmp/logfile.txt';
        }
        // define log file from lfile method or use previously set default
        $lfile = $this->log_file ? $this->log_file :$log_file_default;
        // open log file for writing only and place file pointer at the end of the file
        // (if the file does not exist, try to create it)
        $this->fp = fopen($lfile, 'a') or exit("Can't open $lfile!");
    }
}
<!-------------------start write log line-->
$log = new Logging();
// set path and name of log file (optional)
$log->lfile('/tmp/mylog.txt');
// write message to the log file
$log->lwrite('Test message1');
$log->lwrite('Test message2');
$log->lwrite('Test message3');
// close log file
$log->lclose();
<!——————-start get log line–>
<html>
<head>
<title>File read demo</title>
</head>
<body>
<?php
$file = "/tmp/logfile.txt";
$f = fopen($file, "r");
while ( $line = fgets($f, 1000) ) {
print $line;
}
?>
</body>
</html>

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