src/ErrorHandler/ErrorHandler.php
protected function buildError($errType, $errMsg, $file, $line, $vars)
    {
        // determine $category
        foreach ($this->errCategories as $category => $errTypes) {
            if (\in_array($errType, $errTypes)) {
                break;
            }
        }
        $errorValues = array(
            'type'      => $errType,                    // int
            'typeStr'   => $this->errTypes[$errType],   // friendly string version of 'type'
            'category'  => $category,
            'message'   => $errMsg,
            'file'      => $file,
            'line'      => $line,
            'vars'      => $vars,
            'backtrace' => array(), // only for fatal type errors, and only if xdebug is enabled
            'continueToNormal' => false,    // aka, let PHP do its thing (log error)
            'continueToPrevHandler' => $this->cfg['continueToPrevHandler'] && $this->prevErrorHandler,
            'exception' => $this->uncaughtException,  // non-null if error is uncaught-exception
            'hash'          => null,
            'isFirstOccur'  => true,
            'isHtml'        => \filter_var(\ini_get('html_errors'), FILTER_VALIDATE_BOOLEAN)
                && !\in_array($errType, $this->userErrors) && !$this->uncaughtException,
            'isSuppressed'  => false,
        );
        $hash = $this->errorHash($errorValues);
        $isFirstOccur = !isset($this->data['errors'][$hash]);
        // if any instance of this error was not supprssed, reflect that
        if ($errorValues['isHtml']) {
            $errorValues['message'] = \str_replace('<a ', '<a target="phpRef" ', $errorValues['message']);
        }
        $isSuppressed = !$isFirstOccur && !$this->data['errors'][$hash]['isSuppressed']
            ? false
            : \error_reporting() === 0;
        if (!empty($this->data['errorCaller'])) {
            $errorValues['file'] = $this->data['errorCaller']['file'];
            $errorValues['line'] = $this->data['errorCaller']['line'];
        }
        if (\in_array($errType, array(E_ERROR, E_USER_ERROR))) {
            // will return empty unless xdebug extension installed/enabled
            $errorValues['backtrace'] = $this->backtrace($errorValues);
        }
        $errorValues = \array_merge($errorValues, array(
            'continueToNormal' => !$isSuppressed && $isFirstOccur,
            'hash' => $hash,
            'isFirstOccur' => $isFirstOccur,
            'isSuppressed' => $isSuppressed,
        ));
        return new Event($this, $errorValues);
    }
protected function buildError($errType, $errMsg, $file, $line, $vars)
    {
        // determine $category
        foreach ($this->errCategories as $category => $errTypes) {
            if (\in_array($errType, $errTypes)) {
                break;
            }
        }
        $errorValues = array(
            'type'      => $errType,                    // int
            'typeStr'   => $this->errTypes[$errType],   // friendly string version of 'type'
            'category'  => $category,
            'message'   => $errMsg,
            'file'      => $file,
            'line'      => $line,
            'vars'      => $vars,
            'backtrace' => array(), // only for fatal type errors, and only if xdebug is enabled
            'continueToNormal' => false,    // aka, let PHP do its thing (log error)
            'continueToPrevHandler' => $this->cfg['continueToPrevHandler'] && $this->prevErrorHandler,
            'exception' => $this->uncaughtException,  // non-null if error is uncaught-exception
            'hash'          => null,
            'isFirstOccur'  => true,
            'isHtml'        => \filter_var(\ini_get('html_errors'), FILTER_VALIDATE_BOOLEAN)
                && !\in_array($errType, $this->userErrors) && !$this->uncaughtException,
            'isSuppressed'  => false,
        );
        $hash = $this->errorHash($errorValues);
        $isFirstOccur = !isset($this->data['errors'][$hash]);
        // if any instance of this error was not supprssed, reflect that
        if ($errorValues['isHtml']) {
            $errorValues['message'] = \str_replace('<a ', '<a target="phpRef" ', $errorValues['message']);
        }
        $isSuppressed = !$isFirstOccur && !$this->data['errors'][$hash]['isSuppressed']
            ? false
            : \error_reporting() === 0;
        if (!empty($this->data['errorCaller'])) {
            $errorValues['file'] = $this->data['errorCaller']['file'];
            $errorValues['line'] = $this->data['errorCaller']['line'];
        }
        if (\in_array($errType, array(E_ERROR, E_USER_ERROR))) {
            // will return empty unless xdebug extension installed/enabled
            $errorValues['backtrace'] = $this->backtrace($errorValues);
        }
        $errorValues = \array_merge($errorValues, array(
            'continueToNormal' => !$isSuppressed && $isFirstOccur,
            'hash' => $hash,
            'isFirstOccur' => $isFirstOccur,
            'isSuppressed' => $isSuppressed,
        ));
        return new Event($this, $errorValues);
    }
Build error object

Error object is simply an event object

@param integer $errType the level of the error
@param string  $errMsg  the error message
@param string  $file    filepath the error was raised in
@param string  $line    the line the error was raised in
@param array   $vars    active symbol table at point error occured

@return Event