PHP color value conversion PHP realizes the conversion of hexadecimal numbers and color values

/**
* Conversion between color values ​​and hexadecimal numbers
* edit: WWW.JBXUE.COM
*/
function toHex($N) {
 if ($N==NULL) return "00";
 if ($N ==0) return "00";
 $N=max(0,$N);
 $N=min($N,255);
 $N=round($N);
 $string = "0123456789ABCDEF" ;
 $val = (($N-$N%16)/16);
 $s1 = $string{$val};
 $val = ($N%16);
 $s2 = $string{$val };
 return $s1.$s2;
}
//Convert color value to hexadecimal number
function rgb2hex($r,$g,$b){
 return toHex( $r).toHex($g).toHex($b);
}
//Convert hexadecimal numbers to color values
function hex2rgb($N){
 $dou = str_split($N,2);
 return array(
 "R" => hexdec($dou[0]),
 "G" => hexdec($dou[1]),
 "B" => hexdec($dou[2])
 );
}
echo rgb2hex(106,48,48);
echo ' ';
print_r(hex2rgb("6A3030"));
?>