How to get available values for SET field?

Kirzilla’s Question:

Is there any way to get available values for SET field in table?

Thank you.

You can retrieve the possible values for a SET field using DESCRIBE myTableName mySetColumn or SHOW COLUMNS FROM myTableName LIKE mySetColumn:

  mysql> DESCRIBE myTableName mySetColumn;
  | Field | Type                                      | Null | Key | Default | Extra |
  | myset | set('Travel','Sports','Dancing','Dining') | YES  |     | NULL    |       |

Informative article here, manual here.

Here is how to get the possible values of SET using PDO extension.

function get_set($table, $column)

    global $db; //PDO DB Handler

    $sql = "SHOW COLUMNS FROM $table LIKE :column";
    $stmt = $db -> prepare($sql);

    $stmt -> bindParam(":column", $column, PDO::PARAM_STR, 50);

    try {
        $result = $stmt -> execute();
        $row = $stmt -> fetch(PDO::FETCH_ASSOC);
        $set = $row['Type'];
        $set  = substr($set,5,strlen($set)-7);
        // Split into an array.
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Copy table row data to a form in html

Joel Paxton’s Question:

I have a page which has a form/table.

I want to be able to click on a button at the end of a row, or the row itself and copy this data into another form on a separate html page, which can then be edited.

I know it probably has something to do with JQuery, however I have little to no experience with that.

If you require more details, I will happily provide.


Here is what it looks like now (it’s a table which has retrieved data from an xml file using SimpleXML):

<form name ="editEvent" method="post" action="editEvent.php">
    <table border="1">
        <tr bgcolor="#FFA500">
            <th>ID #</th>
            <th>Start Time</th>
            <th>End Time</th>
            <th>Picture Path</th>
        </tr>   <tr>
          <td>Description of what is going on</td>
          <td>where it is</td>
          <td>a photo link</td>
          <td><input type="submit" name="edit" class ="box" value="Edit/Delete"/></td>

I want it to end up in a table like this:

        <td><input type="text" name="name" placeholder="Enter new event name..."/></td>
        <td><input type="text" name="time" placeholder="Enter event start time..."/></td>
        <td><input type="text" name="endtime" placeholder="Enter event end time..."/></td>
        <td><input type="text" name="category"/></td>
        <td><input type="text" name="description" placeholder="Enter a description of the event..."/></td>
        <td><input type="text" name="loc"/></td>
        <td><input type="text" name="picturePath" placeholder="Enter link to picture..."/></td>
        <td><input type="submit" name="create" class="box" value="Create"/></td>

Honestly, any help or even pointers in the right direction would be appreciated.

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Using .on() and targeting elements with a specific ID

Brandon Durham’s Question:

I understand you can use .on() to attach a single click event to an element and then specify which child elements receive the click. So, for example:

$(this.el).on("click", "span", function () {

I need to be a bit more specific and target selectors with a particular attribute, like this:

$(this.el).on("click", "span[data-placeholder]", function () {

That doesn’t seem to work, though. As soon as I add the attribute it stops working. No errors, just doesn’t seem to find the elements.

Is that the expected behavior? Is there a way around it?


$(this.el) is just a div that contains a number of elements, some of which are <span data-placeholder="First Name"></span> tags.

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How to turn variable name into string in JS?

Jehan’s Question:

I am trying to write a convenience wrapper for console.log, and I would like to print any variables passed in along with their contents.

Can I turn a variable name into a string in js?

There is a possibility. And here is how

var passed_variable = '65'; // The actual variable
var varname = 'passed_variable'; // The name of the variable in another variable

Now, pass the varname around but not the actual variable. When you need to the value of the variable you can simply do :

console.log(varname, ' : ', window[varname]); // Outputs, passed_variable : 65

I hope you find a way not to use this.

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Set content-type on blob

Chris Nolet’s Question:

We’re transferring a Blob (image) down a websocket and rendering it to a canvas on the other end.

When I use createObjectURL with the blob, I get this error:

Resource interpreted as Image but transferred with MIME type text/plain: "blob:https%3A//".

We create the object URL using the following code. The blob is send via a standard websocket with socket.binaryType = "blob"; on the client side:

socket.onmessage = function(e) {
  var blob =;
  var url = (window.URL || window.webkitURL).createObjectURL(blob);

  var image = document.createElement('img');
  image.src = url;

The only way I can think to address this error is to create a copy of the blob with the following code, but I don’t want to introduce the overhead of copying all the data:

var blob = new Blob([], {
  type: 'image/gif'

The method gets called dozens of times per second.

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insert &lt;/br&gt; after comma with php

Vektor’s Question:

I array text from custom field “black, grey, white” with this code:

<?php global $wp_query; $postid = $wp_query->post->ID; echo get_post_meta($postid, 'colors', true); ?>

I want show me like this:


It’s possible with PHP? Many thanks

Use str_replace():

echo str_replace(",", "<br />", get_post_meta($postid, 'colors', true));
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Log in script load users name

User2827404’s Question:

ive just built a php and mysql log in script which forwards to a members area. I now want the members name that loged in to be displayed, somthing like welcome Stephen for example.

what would be the best way to do this?

ok this is my code once the submit button has been pressed:


$host="localhost"; // Host name
$username="stephen2_phptest"; // Mysql username
$password="********"; // Mysql password
$db_name="stephen2_phptest"; // Database name
$tbl_name="registers"; // Table name

// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

// username and password sent from form

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM registers WHERE email='$myusername' and password='$mypassword'";

// Mysql_num_row is counting table row

// If result matched $myusername and $mypassword, table row must be 1 row


// Register $myusername, $mypassword and redirect to file "login_success.php"
else {
echo "Wrong Username or Password";

And this is the code for the members area:


$host="localhost"; // Host name
$username="stephen2_phptest"; // Mysql username
$password="********"; // Mysql password
$db_name="stephen2_phptest"; // Database name
$tbl_name="registers"; // Table name

// Connect to server and select databse.
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Devil of a time with jQuery delegate and .not

James Emanon’s Question:

I’ve searched hi and low but couldn’t find a solution. I’ve tried everything.. but can’t get this thing to work.

NOTE: Can’t use “.on()” . Using an older version of jQuery that only supports .live/.delegate

basically, I have a very involved webpage.. and there are event handlers flying everwhere.. BUT, I basically want to attach a click event on the body BUT exclude certain id’s. Great. Figured it would be easy.


 jQuery('body').delegate('.not("#mainID #anotherID")','click', function(e){ 
    // do something

 jQuery('body').delegate(':not(".class1 .class2")','click', function(e){ 
    // do something


and a bunch bunch more.. basically, cannot get this thing to work.

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Convert String in Array JQUERY

User2789569’s Question:

I have the data array return of the server :

data.arr = [[Date.UTC(2013, 9, 17),1],[Date.UTC(2013, 9, 18),5],[Date.UTC(2013, 9, 19),2],[Date.UTC(2013, 9, 20),4]]

    [0] "[Date.UTC(2013, 9, 17),1]" String
    [1] "[Date.UTC(2013, 9, 18),5]" String
    [2] "[Date.UTC(2013, 9, 19),2]" String
    [3] "[Date.UTC(2013, 9, 20),4]" String

I need to pass only value to a function that recepeit an array[i,y], i need that stay following; i need to remove the “”.

    [0] [Date.UTC(2013, 9, 17),1]
    [1] [Date.UTC(2013, 9, 18),5]
    [2] [Date.UTC(2013, 9, 19),2]
    [3] [Date.UTC(2013, 9, 20),4]

How to do it?

data.arr = [[Date.UTC(2013, 9, 17),1],[Date.UTC(2013, 9, 18),5],
[Date.UTC(2013, 9, 19),2],[Date.UTC(2013, 9, 20),4]]

This code should already give you a timestamp value, but I am assuming you are asking about when it is treated as string so as suggested in comments, you can use eval to evaluate the string as Data Object.

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