note 99478 added to function.hexdec

Use this function to convert a hexa decimal color code to its RGB equivalent. Unlike many other functions provided here, it will work correctly with hex color short hand notation. Also, if a proper hexa decimal color value is given (6 digits), it uses bit wise operations for faster results. For eg: #FFF and #FFFFFF will produce the same result <?php /** * Convert a hexa decimal color code to its RGB equivalent * * @param string $hexStr (hexadecimal color value) * @param boolean $returnAsString (if set true, returns the value separated by the separator character. Otherwise returns associative array) * @param string $seperator (to separate RGB values. Applicable only if second parameter is true.) * @return array or string (depending on second parameter. Returns False if invalid hex color value) */ function hex2RGB($hexStr, $returnAsString = false, $seperator = ',') { $hexStr = preg_replace("/[^0-9A-Fa-f]/", '', $hexStr); // Gets a proper hex string $rgbArray = array(); if (strlen($hexStr) == 6) { //If a proper hex code, convert using bitwise operation. No overhead... faster $colorVal = hexdec($hexStr); $rgbArray['red'] = 0xFF & ($colorVal >> 0x10); $rgbArray['green'] = 0xFF & ($colorVal >> 0x8); $rgbArray['blue'] = 0xFF & $colorVal; } elseif (strlen($hexStr) == 3) { //if shorthand notation, need some string manipulations $rgbArray['red'] = hexdec(str_repeat(substr($hexStr, 0, 1), 2)); $rgbArray['green'] = hexdec(str_repeat(substr($hexStr, 1, 1), 2)); $rgbArray['blue'] = hexdec(str_repeat(substr($hexStr, 2, 1), 2)); } else { return false; //Invalid hex color code } return $returnAsString ? implode($seperator, $rgbArray) : $rgbArray; // returns the rgb string or the associative array } ?> OUTPUT: hex2RGB("#FF0") -> array( red =>255, green => 255, blue => 0) hex2RGB("#FFFF00) -> Same as above hex2RGB("#FF0", true) -> 255,255,0 hex2RGB("#FF0", true, ":") -> 255:255:0 ---- Server IP: 69.147.83.197 Probable Submitter: 121.242.90.162 ---- Manual Page -- http://www.php.net/manual/en/function.hexdec.php Edit -- https://master.php.net/note/edit/99478 Del: integrated -- https://master.php.net/note/delete/99478/integrated Del: useless -- https://master.php.net/note/delete/99478/useless Del: bad code -- https://master.php.net/note/delete/99478/bad+code Del: spam -- https://master.php.net/note/delete/99478/spam Del: non-english -- https://master.php.net/note/delete/99478/non-english Del: in docs -- https://master.php.net/note/delete/99478/in+docs Del: other reasons-- https://master.php.net/note/delete/99478 Reject -- https://master.php.net/note/reject/99478 Search -- https://master.php.net/manage/user-notes.php