How to convert hexadecimal color value to RGB value in php
Most of the CMS provides a color picker in admin panel to user to choose a color. And almost all of the color pickers return the color code as hexadecimal mode, e.g. #4EE4D3. So, you can just get the value and set the color in css. For example:
[php]
body{
background:
}
[/php]
This is a very good practice. Problem occurs if you want to put a opacity option to the user. You can set background opacity with hexadecimal color value. You must use RGBA filter, so RGB color mode as well. Like:
[css]
body{
background: rgba(233, 122, 234, 0.7);
}
[/css]
So, we need to convert the hexadecimal value to its equivalent rgb value. Here is a very small function that will do the job:
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| <?php | |
| function hex2rgb($hex) { | |
| $hex = str_replace("#", "", $hex); | |
| if(strlen($hex) == 3) { | |
| $r = hexdec(substr($hex,,1).substr($hex,,1)); | |
| $g = hexdec(substr($hex,1,1).substr($hex,1,1)); | |
| $b = hexdec(substr($hex,2,1).substr($hex,2,1)); | |
| } else { | |
| $r = hexdec(substr($hex,,2)); | |
| $g = hexdec(substr($hex,2,2)); | |
| $b = hexdec(substr($hex,4,2)); | |
| } | |
| $rgb = array($r, $g, $b); | |
| return implode(",", $rgb); // returns the rgb values separated by commas | |
| //return $rgb; // returns an array with the rgb values | |
| } |
So using this function you will get the rgb value, and with that you use the opacity 
Hope you will enjoy!
