How can the target attribute be used in the <form> tag to specify that the form should open in the same window in PHP?

To specify that a form should open in the same window in PHP, you can use the target attribute in the <form> tag and set it to "_self". This will ensure that the form submission results are displayed in the same window/tab.

&lt;form action=&quot;submit.php&quot; method=&quot;post&quot; target=&quot;_self&quot;&gt;
  &lt;!-- form inputs go here --&gt;
  &lt;input type=&quot;submit&quot; value=&quot;Submit&quot;&gt;
&lt;/form&gt;