System error log

Question

When I see my system.log I see a error name :

2015-12-16T15:15:19+00:00 DEBUG (7): is_readable() expects parameter 1 to be a valid path, string given/data/web/public/lib/Varien/Io/File.php

Does anyone know where this error comes from and what I can do about it?

When I go to the file file.php. I see the code:

protected function _checkSrcIsFile($src)
{
    $result = false;
    if (is_string($src) && is_readable($src) && is_file($src)) {
        $result = true;
    }
    return $result;
 }

Answer 1

The log entry

is_readable() expects parameter 1 to be a valid path, string given

occurs due to a bug in the Varien library. The method Varien_Io_File::write() can be used to either

1. write given data to a given destination file or
2. copy the contents from a given source file to a given destination file.

These use cases are distinguished by checking the second parameter $src of the aforementioned method via call to Varien_Io_File::_checkSrcIsFile().

If $src turns out to be a filename, its contents are copied to the destination (use case 2). Otherwise it is interpreted as plain data (use case 1). The check applies function.is-readable which always emits given warning in use case 1.

What you can do about it:

• Replace the initial call to Varien_Io_File::write()
• Fix the erroneous conditional switch
• Ignore the log entries