Behat : add screenshot on error

FeatureContext.php

<?php
 
class FeatureContext extends MinkContext {
 
    /**
     * Take screenshot when step fails. Works only with Selenium2Driver.
     * Screenshot is saved at [Date]/[Feature]/[Scenario]/[Step].jpg
     *
     * @AfterStep @javascript
     */
    public function takeScreenshotAfterFailedStep(Behat\Behat\Event\StepEvent $event) {
        if ($event->getResult() === Behat\Behat\Event\StepEvent::FAILED) {
            $driver = $this->getSession()->getDriver();
            if ($driver instanceof Behat\Mink\Driver\Selenium2Driver) {
                $step = $event->getStep();
                $path = array(
                    'date' => date("Ymd-Hi"),
                    'feature' => $step->getParent()->getFeature()->getTitle(),
                    'scenario' => $step->getParent()->getTitle(),
                    'step' => $step->getType() . ' ' . $step->getText()
                );
                $path = preg_replace('/[^\-\.\w]/', '_', $path);
                $filename = '/tmp/behat/' .  implode('/', $path) . '.jpg';
 
                // Create directories if needed
                if (!@is_dir(dirname($filename))) {
                    @mkdir(dirname($filename), 0775, TRUE);
                }
 
                file_put_contents($filename, $driver->getScreenshot());
            }
        }
    }
}