php异常：Parse error: syntax error, unexpected eval()'d code error

When an eval()'d code error error message appears in PHP, it is usually due to a template error. The reasons are as follows:

1. The judgment statement in the calling template is incorrect. 2. Some functions calling php or SiteEngine are incorrect. 3. Some problems caused by single quotes or double quotes.

The cause has been found, and everyone knows what to do with the corresponding solution.