在新版的WordPress中，系统已经多次提示升级PHP，考虑到新版本更高效更安全，所以决定升级。
可是，升级完成后，网站出现大量报错，报错信息如下：
Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/wordpress/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340