PHP Pass Variables to register_shutdown_function - Fatal Error Handler

Question

I know this is not proper error handling, but it is necessary to solve my problem. I am running a script that parses data in a loop over many hours, so I create a logs of what is happening in the script at various moments to ensure everything is being handled correctly. All my logs are saved in a different folder than the .php file. I was recording and logging tons of information. But, all the connecting to the log file was tremendously slowing down my program. Instead i have a global $write variable and I just append it. In order to speed up my program I just want to append my log file with $write, once at the end of each loop. The problem is that I set a max_execution_time for my program and if it dies before the loop is done, all my logs for that loop are lost. As part of my register_shutdown_function() I want to log $write.

Here's what I have:

register_shutdown_function( "fatal_handler");
function fatal_handler() {

  global $file, $write;
  $errfile = "unknown file";
  $errstr  = "shutdown";
  $errno   = E_CORE_ERROR;
  $errline = 0;

  $error = error_get_last();

  if( $error !== NULL) {
    $errno   = $error["type"];
    $errfile = $error["file"];
    $errline = $error["line"];
    $errstr  = $error["message"];

    file_put_contents($file, "\n\nFATAL ERROR\n\n", FILE_APPEND);
    file_put_contents($file, $write, FILE_APPEND);
  }
}

The problem is that I get this error message: Warning: file_put_contents(../../resultLogs/log.txt): failed to open stream: No such file or directory in C:\www\php\data_utils\program.php on line 64

Mind you $file works fine in the rest of the program... Help please!

davidkonrad · Accepted Answer · 2015-05-20 20:02:16Z

1

See the docs :

Working directory of the script can change inside the shutdown function under some web servers, e.g. Apache.

So be sure to use an absolute path when doing this, i.e

file_put_contents('<absolute-path-to>/resultLogs/log.txt', $write, FILE_APPEND);

As you wrote "All my logs are saved in a different folder than the .php file", and I guess that your problem is, that you are having the $file constant relative to that .php file but the directory changes upon error..

edited May 20, 2015 at 20:02

answered May 20, 2015 at 19:50

davidkonrad

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