PHP / Apache fwrite updates the modified date but doesn't write

Using PHP fwrite simple example, the code updates the file (Modified date/time changes) but nothing is written. I get no errors. I get:

Success, wrote (Add this to the file ) to file (./errors/test.txt)

Yet the file is empty and the date modifies changes - as though it was written to.

I'm on PHP 7.0/Apache2 Debian (Raspberry Pi B). I started setting the file permissions to 755 and changed it to 777 with no success. Owner is www-data - and I've tried root and another owner - both fail, because you need to set owner to www-data for it to write.

I have tried both ./errors/test.txt and errors/test.txt - it makes no difference.

I have tried fopen($filename, 'a') and fopen($filename, 'w') and both produce the same result.

<?php  $filename = './errors/test.txt';  $somecontent = "Add this to the file\n";    // Let's make sure the file exists and is writable first.  if (is_writable($filename)) {        // In our example we're opening $filename in append mode.      // The file pointer is at the bottom of the file hence      // that's where $somecontent will go when we fwrite() it.      if (!$handle = fopen($filename, 'a')) {           echo "Cannot open file ($filename)";           exit;      }        // Write $somecontent to our opened file.      if (fwrite($handle, $somecontent) === FALSE) {          echo "Cannot write to file ($filename)";          exit;      }        echo "Success, wrote ($somecontent) to file ($filename)";        fclose($handle);    } else {      echo "The file $filename is not writable";  }  ?>    

https://stackoverflow.com/questions/66610004/php-apache-fwrite-updates-the-modified-date-but-doesnt-write March 13, 2021 at 12:00PM