What could be causing the issue of the $_POST variable being empty when umlauts are included in a <textarea>?

The issue of the $_POST variable being empty when umlauts are included in a <textarea> may be due to encoding problems. To solve this, you can set the form's enctype attribute to "multipart/form-data" to properly handle special characters like umlauts. 

&lt;form method=&quot;post&quot; action=&quot;process_form.php&quot; enctype=&quot;multipart/form-data&quot;&gt;
  &lt;textarea name=&quot;message&quot;&gt;&lt;/textarea&gt;
  &lt;input type=&quot;submit&quot; value=&quot;Submit&quot;&gt;
&lt;/form&gt;

Keywords

$_POST umlauts <textarea> encoding form submission

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