Add id attribute to h1 element of wordpress post

You have to use the code editor. Be careful, do not write the head part, HTML tag and body tag. The syntax would be:

<h1 id="XYZ">XYZ</h1>

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)