Taco HTML Edit Help > Syntax Checking
Taco HTML Edit has the ability to find syntax errors for HTML and PHP documents. For an HTML document, select "Check Tag Syntax/Structure..." from the "Syntax" menu. A panel where appear that describes the errors found in the document. These errors include structure errors, which would include problems in tag nesting or tags that are not properly closed, and syntax errors, which refers to unrecognized tag or attribute names and invalid attribute values. By default, both types of errors are displayed, but the checkboxes at the bottom of the panel can be used to selectively show only certain types of errors. To view the details about a particular error, select the tag in the "Tag Name" list.

It is possible to check the syntax of a portion of an HTML document by selecting the relevant text, and then choosing "Check Selected Tag Syntax..." from the "Syntax" menu.
To check the syntax of a PHP document, select "Check PHP Syntax" from the "Syntax" menu. A panel will appear describing any errors reported by the PHP command line interface. Also, you can check the syntax of the HTML output processed by executing a particular PHP document. To do this, select "Check HTML Generated by PHP" from the "Syntax" menu.