PHP function to print stack trace arguments into log

Question

I'm trying to collect debug information in my error handler function. I can analyze the stack and get the file and line number. I also have an array of arguments which I would like to print into my log as well but I don't want to bloat the log file.

I want to print all numbers, booleans, strings (for example the first 50 characters), class names for objects, size of arrays, null for nulls and whatever comes up later in a reasonable form. It should produce no new lines so I have one line per stack entry.

Since I don't want to reinvent the wheel, is there a function out of the box exist in PHP which will behave as described?

Ray Hunter · Accepted Answer · 2017-02-19 19:01:35Z

1

You can check if there are php packages or libs that do logging. For example, pear has some logging packages you can use under Logging.

answered Feb 19, 2017 at 19:01

Ray Hunter

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Pavel Niedoba Over a year ago

I would prefer not to add another lib since this is supposed to be simple

Pavel Niedoba · Accepted Answer · 2017-02-20 16:37:27Z

First I tried to do it myself:

debug_backtrace();

gives array of which I processed using:

protected function backTraceLine(array $line)
{
    $ret = "";
    if (isset ($line['file']))
        $ret = $ret . $line['file'];
    if (isset ($line['function']))
        $ret = $ret . $line['function'];
    if (isset ($line['file']))
        $ret = "[" . $ret . $line['line'] . "]";
    try {
        $args = $line['args'];
        if (is_array($args))
            $ret = $ret . "(" . implode(",", $args) . ")";
    } catch (Exception $e) {
    }
    return $ret;
}

But later I found this method which does exactly what I need:

$exception->getTraceAsString()

If there's no Exception in place we can create new one and get stack from there

Nadir Latif · Accepted Answer · 2017-02-21 06:36:20Z

1

You can also use XDebug to generate a stack trace: https://xdebug.org/docs/stack_trace

answered Feb 21, 2017 at 6:36

Nadir Latif

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