尝试添加到您的调试代码中.使您的调试电子邮件还在输出文件时向您发送 debug_backtrace 调用的输出.通过这种方式，您可以看到从最外层脚本到发生错误的行所采用的确切路径.

Try adding to your debug code. Make your debug emails also send you the output of a debug_backtrace call at the time the file is output. This way you can see the exact path taken to get from the outermost script, to the line where the error is occurring.