From php table retrieve data from selected checkbox - php

Question

I have below php table, it has row and column. Each row has checkbox, I am trying to retrieve email data from row that checkbox is selected. I can do this with Jquery, but since I can't save in text file. I am trying to do same thing with PHP. I try couple things, but none worked.
<?php
echo "<table border='1' bordercolor='red' id='event_table'>
<tr>
<th> <input type='checkbox' id='chk_all' /> </th>
<th>Id</td>
<th>Email</th>
<th>Name</th>
<th>Car</th>
<th>Phone</th>
</tr>";
while($row = mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td> <input type='checkbox' id='chk[]'/> </td>";
echo "<td>" . $row['id'] . "</td>";
echo "<td>" . $row['email'] . "</td>";
echo "<td>" . $row['name'] . "</td>";
echo "<td>" . $row['car'] . "</td>";
echo "<td>" . $row['phone'] , "</td>";
echo "</tr>";
}
echo "</table>";
?>

Answer 1

You can do this using Hidden fields and some indentity implementation on name= (and id= as well). Here are some inputs from my end but you can modify the code as per your requirements.
while($row = mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td> <input type='checkbox' name='chk_".$row['id']."' id='SHOULD_BE_UNIQUE_ON_THIS_PAGE'/> </td>";
echo "<td>" . $row['id'] . "</td>";
echo "<td>" . $row['email'] . "<input type='hidden' name='chk_".$id."_email' value='".$row['email']."' id='SHOULD_BE_UNIQUE_ON_THIS_PAGE' /></td>";
echo "<td>" . $row['name'] . "</td>";
echo "<td>" . $row['car'] . "</td>";
echo "<td>" . $row['phone'] . "</td>";
echo "</tr>";
}
echo "</table>";
Here chk_{ID} is your main identifier while filtering data. When you submit the form, you should get to know whether checkbox is checked or not and if it is checked then you will come to know which hidden input field has your data. Hidden fields will not appear in HTML page.

Answer 2

As PHP is a Hypertext Preprocessor language, you can't detect any client action on your page. So here is the best solution: you must detect changes you need with JavaScript/JQuery, and then send the result to a php file via Ajax and handle the result there (In your case save it in a file);
I hope it would be helpful for you. Let me know if you have any questions