Writing file while __desctruct() function

Question

I have found that it is impossible to write (file_put_contents or simple fwrite) inside __destruct() of PHP class, how to invoke that? full function:

    function __destruct()
    {
        foreach($this->data as $name=>$value) $$name=$value;    

        if(count($this->modules)>0)
        {   foreach($this->modules as $name=>$value) 
            {   
                ob_start();
                include $value;
                $content=ob_get_contents();
                ob_end_clean();
                $$name = $content;
            }
        }                   
        ob_start();

        include $this->way;

        $content = ob_get_contents();

        ob_end_clean();

        $fp = fopen('cache.txt', 'w+');
        fputs($fp, $content);
        fclose($fp);

        echo $content; 

    }

Answer 1

It's possible the problem you have is that you're still referencing the object inside of your destruct().

You should have no problems writing to a file in a __destruct at all. The below example proves it:

<?php
    class TestDestruct{
       function __construct(){
          $this->f = 'test';
       }

       function __destruct(){
          print 'firing';
          $fp = fopen('test.txt', 'w+');
          fputs($fp, 'test');
          fclose($fp);
      }
    }


$n = new TestDestruct();
empty($n);

Remember the destruct will only be fired once there are no references to that object. so if you were to be doing something like fputs($fp, $this->f)

then it's not going to work.