Kann mir einer erklären was das bedeutet also was PHP hierbei macht ?
<?php if(!isset($_POST['submit'])) { ?>
<form action="<?php $PHP_SELF ?>" method="post">
User:
<input type="text" name="username" size="20" class="input"
<?php
if($_POST['username'] != "" ) {echo ' value="'.$_POST['username'].'"';}
?>>
<?php if(!isset($_POST['submit'])) { ?>
<form action="<?php $PHP_SELF ?>" method="post">
User:
<input type="text" name="username" size="20" class="input"
<?php
if($_POST['username'] != "" ) {echo ' value="'.$_POST['username'].'"';}
?>>
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