升级到php 5.6.4后，my widgets文件导致：

Parse error: syntax error, unexpected \'class\' (T_CLASS) in /home/path/fss-widgets.php on line 1

我很困惑——几个小时的研究没有取得任何成果。在这种情况下，问题似乎不是引用、转义或任何其他您期望的内容，代码在我看来还行。

<?php

/*
Plugin Name: FSS Vacancy Widget
Plugin URI: http://www.url.com/
Description: Shows recent vacancies
Author: Name
Version: 1.0
Author URI: http://www.url.com/
*/

class FSSVacancyWidget extends WP_Widget
{
  function FSSVacancyWidget()
  {
    $widget_ops = array(\'classname\' => \'FSSVacancyWidget\', \'description\' => \'Displays Recent FSS Jobs on the homepage and all other pages\' );
    $this->WP_Widget(\'FSSVacancyWidget\', \'FSS Vacancies\', $widget_ops);
  }

  function form($instance)
  {
    $instance = wp_parse_args( (array) $instance, array( \'title\' => \'\' ) );
    $title = $instance[\'title\'];
    $fss_numposts = $instance[\'fss_numposts\'];
    $fss_vacurl = $instance[\'fss_vacurl\'];
    $fss_morevac = $instance[\'fss_morevac\'];
?>
    <p><label for="<?php echo $this->get_field_id(\'title\'); ?>">Title: <input class="widefat" id="<?php echo $this->get_field_id(\'title\'); ?>" name="<?php echo $this->get_field_name(\'title\'); ?>" type="text" value="<?php echo attribute_escape($title); ?>" /></label></p>
    <p><label for="<?php echo $this->get_field_id(\'fss_numposts\'); ?>">Number of Posts (Default is 10): <input class="widefat" id="<?php echo $this->get_field_id(\'fss_numposts\'); ?>" name="<?php echo $this->get_field_name(\'fss_numposts\'); ?>" type="text" value="<?php echo attribute_escape($fss_numposts); ?>" /></label></p>
    <p><label for="<?php echo $this->get_field_id(\'fss_vacurl\'); ?>">Vacancy URL: <input class="widefat" id="<?php echo $this->get_field_id(\'fss_vacurl\'); ?>" name="<?php echo $this->get_field_name(\'fss_vacurl\'); ?>" type="text" value="<?php echo attribute_escape($fss_vacurl); ?>" /></label></p>    
    <p><label for="<?php echo $this->get_field_id(\'fss_morevac\'); ?>">More Vacancies Title: <input class="widefat" id="<?php echo $this->get_field_id(\'fss_morevac\'); ?>" name="<?php echo $this->get_field_name(\'fss_morevac\'); ?>" type="text" value="<?php echo attribute_escape($fss_morevac); ?>" /></label></p>   

<?php
  }

  function update($new_instance, $old_instance)
  {
    $instance = $old_instance;
    $instance[\'title\'] = $new_instance[\'title\'];
    $instance[\'fss_numposts\'] = $new_instance[\'fss_numposts\'];
    $instance[\'fss_vacurl\'] = $new_instance[\'fss_vacurl\'];
    $instance[\'fss_morevac\'] = $new_instance[\'fss_morevac\'];
    return $instance;
  }

  function widget($args, $instance)
  {
    extract($args, EXTR_SKIP);

    /* User-selected settings. */
   $fss_numposts = $instance[\'fss_numposts\'];
   $fss_vacurl = $instance[\'fss_vacurl\'];
   $fss_morevac = $instance[\'fss_morevac\'];

    echo $before_widget;
    $title = empty($instance[\'title\']) ? \' \' : apply_filters(\'widget_title\', $instance[\'title\']);

    if (!empty($title))
      echo $before_title . $title . $after_title;;

    echo "<ul class=\'items\'>";

    query_posts( array( \'showposts\' => $fss_numposts ) );
    if ( have_posts() ) : while ( have_posts() ) : the_post();
    echo "<li><a href=\'".get_permalink()."\'><span class=\'job-title\'>".get_the_title()."</span><span class=\'job-date\'>".get_the_date(\'d m Y\')."</span></a></li>";

    endwhile; endif; wp_reset_query();

    echo "</ul>";
    echo"<a href=\'".$fss_vacurl."\' class=\'view\'>".$fss_morevac."</a>";

    echo $after_widget;
  }

}
add_action( \'widgets_init\', create_function(\'\', \'return register_widget("FSSVacancyWidget");\') );

define(\'CR\', "\\r");          // Carriage Return: Classic Mac
define(\'CRLF\', "\\r\\n");      // Carriage Return and Line Feed: Windows
define(\'LF\', "\\n");          // Best: Unix, Linux, Mac, Windows


function fix_endings($s) {
    // Convert all line-endings to the Best format.
    $s = str_replace( CRLF, LF, $s );
    $s = str_replace( CR, LF, $s );
    // Don\'t allow out-of-control blank lines
    $s = preg_replace( "/\\n{2,}/", LF . LF, $s );
    return $s;
}