filp/whoops · error · InvalidArgumentException

$length($length) cannot be lower or equal to 0

Error message

$length($length) cannot be lower or equal to 0

What it means

Error "$length($length) cannot be lower or equal to 0" thrown in filp/whoops.

Source

Thrown at src/Whoops/Exception/Frame.php:212

     * @param  int                      $start
     * @param  int                      $length
     * @return string[]|null
     */
    public function getFileLines($start = 0, $length = null)
    {
        if (null !== ($contents = $this->getFileContents())) {
            $lines = explode("\n", $contents);

            // Get a subset of lines from $start to $end
            if ($length !== null) {
                $start  = (int) $start;
                $length = (int) $length;
                if ($start < 0) {
                    $start = 0;
                }

                if ($length <= 0) {
                    throw new InvalidArgumentException(
                        "\$length($length) cannot be lower or equal to 0"
                    );
                }

                $lines = array_slice($lines, $start, $length, true);
            }

            return $lines;
        }
    }

    /**
     * Implements the Serializable interface, with special
     * steps to also save the existing comments.
     *
     * @see Serializable::serialize
     * @return string
     */

View on GitHub (pinned to fa1bc9c95a)

When it happens

Trigger: Thrown at src/Whoops/Exception/Frame.php:212 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of filp/whoops@fa1bc9c95a (2026-08-21). Data as JSON: /api/errors/f0460bf831116721. Report an issue: GitHub.