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Read log files through Drupal Devel's Execute PHP tool

$out = shell_exec('tail -n 100 /path/to/apache/logs/php_error-log');
dpm($out);

output the last 100 lines from the log file.

Also, using the PHP shell_exec() function you could run "ls" or "less" commands to verify that the proper files are in an environment for which you don't have file level access.

Important note: shell_exec() is a powerful reason to keep PHP filter access restricted to only the most trusted users in your Drupal site - or disabled altogether if not needed.

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