Php post is blank. / Notice: Undefined index: [duplicate]

Question

My form button not sending var via post.

I've followed the code example in the following links.

PHP Pass variable to next page

HTML form is not sending $_POST values

Send value of submit button when form gets posted

but keep getting..

Notice: Undefined index: test in /public_html/test/seats.php on line 3

or blank page when using isset.

PAGE 1

foreach($res as $row) { $title = $row['Title']; $perfDate = $row['PerfDate']; $perfTime = $row['PerfTime']; echo "<tr>"; echo "<td>".$title."</td>"; echo "<td>".$perfDate."</td>"; echo "<td>".$perfTime."</td>"; echo "<td><form action='seats.php' method='post'> <input type= 'hidden' name='test' value=<?php echo $title;?> /> <input type='submit' value='Submit'></form></td>"; echo "</tr>"; }

Ultimately I will be passing row info, to build an SQL query on the next PHP page, however at the moment I am unable to send the even just the $title.

Using the below code gives me nothing so the issue must be with my POST in page 1?

PAGE 2

<?php $value = ""; $value = isset($_POST['test']) ? $_POST['test'] : ''; echo $value; ?>

This line looks suspicious: <input type= 'hidden' name='test' value=<?php echo $title;?> /> Where are the quotes around $title? — Martin
– Martin, Commented Dec 2, 2019 at 13:47
var_dump($_POST); gives array(1) { ["test"]=> string(5) " , with quotes around $title the result is the same.. array(1) { ["test"]=> string(5) " — Gooze_Berry
– Gooze_Berry, Commented Dec 2, 2019 at 13:50

Nathan Kolpa · Accepted Answer · 2019-12-02 14:02:14Z

The problem is this line

echo "<input type= 'hidden' name='test' value=<?php echo $title;?> />"

because the php tag is already opened the above line will output the php tag as a string.

to fix this you can simply do this value=\"$title;\"

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