PHP - Ajax Passing value to another php file

aveeva · July 16, 2019

@Barand For my clarification, this line -> "<td><button class='delbtn' data-id='"+ k +"'>Delete</button></td>"

Edited July 16, 2019 by aveeva

Barand · July 16, 2019

20 hours ago, Barand said:

list = list + "<td><button class='delbtn' data-id='"+ k +"'>Delete</button></td></tr>\n" // add "Delete" button to each playlist item

Was the comment on that line not a sufficient clue?

aveeva · July 16, 2019

@Barand That line okay, i got it, no confusion. My confusion about how can i use in below code,

        <?php
       session_start();
      foreach ($_SESSION['playlist'] as $key => $value) {
        echo "<tr>";
        echo "<td>" . $key . "</td>\n<td>" . $value . "</td>";

            //  code....

        echo "</tr>";    
        }
        ?>

Barand · July 16, 2019

Just echo another <td>..</td> with the delete button html inside it.

aveeva · July 16, 2019

@Barand If i ask any stupid question, make me a pardon, i am learning in php.

        <?php
       session_start();
      foreach ($_SESSION['playlist'] as $key => $value) {
        echo "<tr>";
        echo "<td>" . $key . "</td>\n<td>" . $value . "</td>";

        echo "<td>" ."<button class='delbtn' data-id='"+ k +"'>Delete</button>" . "<td>";


        echo "</tr>";    
        }

        ?>

Pls correct me?

Barand · July 16, 2019

Right idea, but you can't just paste javascript code into php and expect it to work. The variable names and syntax are different.

aveeva · July 16, 2019

@Barand How can i assign in php?

Barand · July 16, 2019

On 7/2/2019 at 12:25 PM, aveeva said:

$statement = $connect->prepare($query);

$statement->execute();

$result = $statement->fetchAll();

$total_row = $statement->rowCount();

$output = '';

In this excerpt from your code, all lines except the execute() are assigning values - you know how to assign in PHP.

ginerjm · July 16, 2019

How is this button going to work? What is it calling? How is the current row of data being passed to whatever script is going to do the delete?

I suggest a form around each row and a proper Submit button (<input type='submit'>) that will do what you need. Using the <button> tag is just not that useful even though people love to use it. I don't get it.

Barand · July 16, 2019

27 minutes ago, ginerjm said:

How is this button going to work? What is it calling? How is the current row of data being passed to whatever script is going to do the delete?

If you read the previous posts and code in this topic before jumping in, all those questions will be answered.

aveeva · July 17, 2019

@Barand If i click delete button whole list will be deleted, how to delete by single,

<html>
<head>

    <style type="text/css">
        table {
            border-collapse: collapse;
            border: 1px solid black;
        }
        table td,th {
            border: 1px solid black;
        }
        td {
            text-align: center;
        }
    </style>
</head>

<body>

    <h2>Play Lists</h2>

    <table id="table">
        <th>Voice SKU</th>
        <th>Voice Name</th>
        <th>Action</th>
    

        <?php
       session_start();
      foreach ($_SESSION['playlist'] as $key => $value) {
        echo "<tr>";
        echo "<td>" . $key . "</td>\n<td>" . $value . "</td>";
        echo "<td>". "<button id='btn'>Delete</button>"."</td>";
        echo "</tr>";    
        }

        ?>
    </table>
    <script>

     var btn = document.getElementById('btn');
    btn.onclick = function () {
    document.getElementById('table').remove();
    this.remove();
};
    
        </script>
</body>
</html>

Barand · July 17, 2019

18 minutes ago, aveeva said:

how to delete by single,

By passing the key of the item you want to delete from the SESSION and not removing the entire table.

aveeva · July 17, 2019

@Barand Did you mean -> document.getElementById('$key').remove(); ?

Edited July 17, 2019 by aveeva

Barand · July 17, 2019

You need to remove them from the SESSION, not just from the page display, then redisplay the list from the session data. Otherwise, when you eventually save the session data the deleted items will still be there.

aveeva · July 19, 2019

help me with my workout :

my_cart.php:

    <?php
    header('Content-Type: text/html; charset=utf-8');
    session_start();
    session_regenerate_id();

    echo '
    <!DOCTYPE html>
    <html lang="en">
        <head>
            <meta charset="utf-8">
            <metaname="viewport"content="width=device-width,height=device-height,initial-scale=1">
            <title>Playlist</title>
        </head>

        <body>
            <form id="playlist" action="playlist_action.php" method="post">
                <table id="playlist">
                    <caption>Play List</caption>
                    <thead>
                        <tr>
                            <th scope="col">Voice SKU</th>
                            <th scope="col">Voice Name</th>
                            <th scope="col">Action</th>
                        </tr>
                    </thead>

                    <tbody>';
                        foreach ($_SESSION['playlist'] as $key => $value) 
                        {
                            $key = htmlspecialchars($key);
                            echo '
                            <tr>
                                <th scope="row">', $key, '</th>
                                <td>', htmlspecialchars($value), '</td>
                                <td><button name="delete" value="', $key, '">Delete</button></td>
                            </tr>';
                        }
                        echo '
                    </tbody>
                </table>
            </form>
        </body>
    </html>

playlist_action.php

<?php
header('Content-Type: text/html; charset=utf-8');
session_start();
session_regenerate_id();

if (array_key_exists('playlist_action', $_POST)) {
	switch ($_POST['playlist_action']) {
		case 'delete':
			if (array_key_exists($_POST['delete'], $_SESSION['playlist']) {
				unset($_SESSION['playlist'][$_POST['delete']]);
                // notify user of successful delete
			} else {
				// notify user of non-existent key in the playlist
			}	
		default:
			// handle invalid/unknown action here.
	}
}
?>

my output:

|Parse error: syntax error, unexpected 'unset' (T_UNSET) in C:\wamp\www\voice_bank\playlist_action.php on line *10*|

Edited July 19, 2019 by aveeva

Barand · July 19, 2019

On the line before the "unset" ...

if (array_key_exists($_POST['delete'], $_SESSION['playlist']) {

... count the number of opening parentheses "(" and count the number of closing ones.

(That should show you why the "unset" is unexpected)

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PHP - Ajax Passing value to another php file

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