public function emailErrors()
{
if ($this->settings->get('send_errors_to_email') == '') {
trigger_error('Can\'t send errors to email - no email address is specified', E_USER_WARNING);
return;
}
$log = Elm_PhpErrorLog::autodetect();
if (is_wp_error($log)) {
trigger_error('Error log not detected', E_USER_WARNING);
return;
}
$lines = $log->readLastLines($this->settings->get('email_line_count'), true);
if (is_wp_error($lines)) {
trigger_error('Error log is not accessible', E_USER_WARNING);
return;
}
//Only include messages logged since the previous email.
$logEntries = array();
$foundNewMessages = false;
$lastEmailTimestamp = $this->settings->get('email_last_line_timestamp');
foreach ($lines as $line) {
$foundNewMessages = $foundNewMessages || $line['timestamp'] > $lastEmailTimestamp;
if ($foundNewMessages) {
$logEntries[] = $line;
}
}
if (!empty($logEntries)) {
$subject = sprintf('PHP errors logged on %s', site_url());
$body = sprintf("New PHP errors have been logged on %s\nHere are the last %d lines from %s:\n\n", site_url(), count($logEntries), $log->getFilename());
$stripWordPressPath = $this->settings->get('strip_wordpress_path');
$lastEntryTimestamp = time();
//Fall-back value in case none of the new entries have a timestamp.
foreach ($logEntries as $logEntry) {
if ($stripWordPressPath) {
$logEntry['message'] = $this->stripWpPath($logEntry['message']);
}
if (!empty($logEntry['timestamp'])) {
$body .= '[' . $this->formatTimestamp($logEntry['timestamp']) . '] ';
$lastEntryTimestamp = $logEntry['timestamp'];
}
$body .= $logEntry['message'] . "\n";
}
if (wp_mail($this->settings->get('send_errors_to_email'), $subject, $body)) {
$this->settings->set('email_last_line_timestamp', $lastEntryTimestamp);
} else {
trigger_error('Failed to send an email, wp_mail() returned FALSE', E_USER_WARNING);
}
}
}
public function displayWidgetContents()
{
$log = Elm_PhpErrorLog::autodetect();
if (is_wp_error($log)) {
$this->displayConfigurationHelp($log->get_error_message());
return;
}
$doClearLog = isset($_GET['elm-action']) && ($_GET['elm-action'] = 'clear-log') && check_admin_referer('clear-log') && current_user_can($this->requiredCapability);
if ($doClearLog) {
$log->clear();
echo '<p><strong>Log cleared.</strong></p>';
}
$lines = $log->readLastLines($this->settings->get('widget_line_count'), true);
if (is_wp_error($lines)) {
printf('<p>%s</p>', $lines->get_error_message());
} else {
if (empty($lines)) {
echo '<p>The log file is empty.</p>';
} else {
echo '<table class="widefat"><tbody>';
$isOddRow = false;
foreach ($lines as $line) {
$isOddRow = !$isOddRow;
if ($this->settings->get('strip_wordpress_path')) {
$line['message'] = $this->plugin->stripWpPath($line['message']);
}
printf('<tr%s><td style="white-space:nowrap;">%s</td><td>%s</td></tr>', $isOddRow ? ' class="alternate"' : '', !empty($line['timestamp']) ? $this->plugin->formatTimestamp($line['timestamp']) : '', esc_html($line['message']));
}
echo '</tbody></table>';
echo '<p>';
printf('Log file: %s (%s) ', esc_html($log->getFilename()), $this->formatByteCount($log->getFileSize(), 2));
printf('<a href="%s" class="button" onclick="return confirm(\'%s\');">%s</a>', wp_nonce_url(admin_url('/index.php?elm-action=clear-log'), 'clear-log'), 'Are you sure you want to clear the error log?', 'Clear Log');
echo '</p>';
}
}
}
public function emailErrors()
{
if ($this->settings->get('send_errors_to_email') == '') {
//Can't send errors to email if no email address is specified.
return;
}
$lock = new Elm_ExclusiveLock('elm-email-errors');
$lock->acquire();
//Note: Locking failures are intentionally ignored. Most of them are likely to be caused by file permissions,
//which are either intentional (making "/wp-content/uploads" non-writable) or not easily fixed by the user.
//It's better to occasionally send multiple email notifications than to never send any.
$log = Elm_PhpErrorLog::autodetect();
if (is_wp_error($log)) {
trigger_error('Error log not detected', E_USER_WARNING);
$lock->release();
return;
}
$lines = $log->readLastLines($this->settings->get('email_line_count'), true);
if (is_wp_error($lines)) {
trigger_error('Error log is not accessible', E_USER_WARNING);
$lock->release();
return;
}
//Only include messages logged since the previous email.
$logEntries = array();
$foundNewMessages = false;
$lastEmailTimestamp = $this->settings->get('email_last_line_timestamp');
$lastEntryTimestamp = time();
//Fall-back value in case none of the new entries have a timestamp.
foreach ($lines as $line) {
$foundNewMessages = $foundNewMessages || $line['timestamp'] > $lastEmailTimestamp;
if ($foundNewMessages) {
$logEntries[] = $line;
}
if (!empty($line['timestamp'])) {
$lastEntryTimestamp = $line['timestamp'];
}
}
if (!empty($logEntries)) {
$subject = sprintf('PHP errors logged on %s', site_url());
$body = sprintf("New PHP errors have been logged on %s\nHere are the last %d lines from %s:\n\n", site_url(), count($logEntries), $log->getFilename());
if ($this->settings->get('sort_order') === 'reverse-chronological') {
$logEntries = array_reverse($logEntries);
}
$stripWordPressPath = $this->settings->get('strip_wordpress_path');
foreach ($logEntries as $logEntry) {
if ($stripWordPressPath) {
$logEntry['message'] = $this->stripWpPath($logEntry['message']);
}
if (!empty($logEntry['timestamp'])) {
$body .= '[' . $this->formatTimestamp($logEntry['timestamp']) . '] ';
}
$body .= $logEntry['message'] . "\n";
}
if (wp_mail($this->settings->get('send_errors_to_email'), $subject, $body)) {
$this->settings->set('email_last_line_timestamp', $lastEntryTimestamp);
} else {
trigger_error('Failed to send an email, wp_mail() returned FALSE', E_USER_WARNING);
}
}
$lock->release();
}
public function handleLogClearing()
{
$doClearLog = isset($_GET['elm-action']) && $_GET['elm-action'] === 'clear-log' && check_admin_referer('clear-log') && current_user_can($this->requiredCapability);
if ($doClearLog) {
$log = Elm_PhpErrorLog::autodetect();
if (is_wp_error($log)) {
return;
}
$log->clear();
wp_redirect(admin_url('index.php?elm-log-cleared=1'));
exit;
}
}