Ancient Temple City

January 2019

Question:

What would be a good way to convert hex color values like #ffffff into the single RGB values 255 255 255 using PHP?


Solution:

Example 1:
Check out PHP's hexdec() and dechex() functions.

<?php
$value = hexdec('ff'); // $value = 255
?>


Example 2:
If you want to convert hex to rgb you can use sscanf.

<?php
$hex = "#ff9900";
list($r, $g, $b) = sscanf($hex, "#%02x%02x%02x");
echo "$hex -> $r $g $b"; // #ff9900 -> 255 153 0
?>

The label itself may be positioned before, after or around the associated control.

Example 1:

<label for="lastname">Last Name</label>
<input type="text" id="lastname" />


Example 2:

<input type="text" id="lastname" />
<label for="lastname">Last Name</label>


Example 3:

<label>
   <input type="text" name="lastname" />
   Last Name
</label>


Note that the third technique cannot be used when a table is being used for layout, with the label in one cell and its associated form field in another cell.

Either one is valid. I like to use either the first or second example, as it gives you more style control.

Have a look at $_SERVER['REQUEST_URI'], i.e.

$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
(Note that the double quoted string syntax is perfectly correct)

If you want to support both HTTP and HTTPS, you can use

$actual_link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

Editor’s note: using this code has security implications. The client can set HTTP_HOST and REQUEST_URI to any arbitrary value it wants.

MKRdezign

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