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：
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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 |
如果上面的代码不直观的话，可以看下图，满屏的报错。
可以很直观的看出错误是来自一款叫 Crayon Syntax Highlighter 的代码高亮插件，在7.1等版本中并没有这个报错，显而易见的是，肯定是新版本语法或表达的变化造成的报错。
解决的办法也很简单，找到报错的文件与行数，进行修改即可，报错的文件是 crayon_langs.class.php的340行。
一般我们可以通过更新插件能适配到最新版的wordpress和PHP，但遗憾的是：
这款插件已经于4年前停止更新了，所以我们需要自己解决，解决的方法很简单：
修改这行代码为下方即可解决该报错信息。
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return preg_replace('/\[^\w-+#]/msi', '', $id); |
即加上转义符好就能解决。