Transform HEX to RGB with PHP

functions.php

<?php
  function hex2RGB($hex) {
  	$hex = str_replace("#", "", $hex);
  	if(strlen($hex) == 3) {
  		$r = hexdec(substr($hex,0,1).substr($hex,0,1));
  		$g = hexdec(substr($hex,1,1).substr($hex,1,1));
  		$b = hexdec(substr($hex,2,1).substr($hex,2,1));
  	} else {
  		$r = hexdec(substr($hex,0,2));
  		$g = hexdec(substr($hex,2,2));
  		$b = hexdec(substr($hex,4,2));
  	}
  	$rgb = array($r, $g, $b);
  	return $rgb;
  }
?>

get_value.php

<?php
  $hex_color = '#333333';
  $rgb_color = hex2RGB($hex_color);
  $result_rgb = implode(", ", $rgb_color);
?>

print_your_result.php

<style type="text/css">
  background-color: rgb(<?php echo $result_rgb;?>);
  /*
    Example how return value in your style
    background-color: rgb('51,51,51');
  */
</style>