不工作mage :: log

Question

Mage::log(print_r($filename, true));

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不在update.php中工作.. 我的主页cpu100％....什么问题？

2016-02-03T04:11:53+00:00 ERR (3): Warning: simplexml_load_string(): <reference name="left">  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-02-03T04:11:53+00:00 ERR (3): Warning: simplexml_load_string(): ^  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-02-03T07:32:04+00:00 ERR (3): Warning: simplexml_load_string(): Entity: line 9: parser error : Extra content at the end of the document  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-02-03T07:32:04+00:00 ERR (3): Warning: simplexml_load_string(): <reference name="left">  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-02-03T07:32:04+00:00 ERR (3): Warning: simplexml_load_string(): ^  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-02-03T10:22:35+00:00 ERR (3): Notice: Undefined variable: filename  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 460
2016-02-03T10:22:35+00:00 DEBUG (7): 
2016-02-03T10:22:49+00:00 ERR (3): Notice: Undefined variable: filename  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 460

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Answer 1

回顾您的错误日志，它看起来它正在工作。行：

2016-02-03T10:22:35+00:00 DEBUG (7): 

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似乎是您的日志，即它是空的。如果你之前看一行：

2016-02-03T10:22:35+00:00 ERR (3): Notice: Undefined variable: filename  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 460

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我们可以看到由于未定义的变量生成filename，您正在收到错误，这是您尝试写入日志文件的变量。因此，对print_r的调用将返回一个空字符串。因此，我假设你的Mage::log呼叫是在app/code/core/Mage/Core/Model/Layout/Update.php的第460行上。