Question

How to convert RGB to hex in PHP

Answer 1

function RGBtoHEX(int $r, int $g, int $b) {   
    return dechex( (($r & 0xff) << 16) + (($g & 0xff) << 8) + ($b & 0xff) );
}
 

$r = 80;
$g = 125;
$b = 210;
     
echo RGBtoHEX($r, $g, $b);

 

 
/*
run:
 
507dd2
 
*/

 

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Answer 2

$r = 80;
$g = 125;
$b = 210;
     
echo sprintf("#%02x%02x%02x", $r, $g, $b);

 
 
 
/*
run:
 
#507dd2
 
*/

 

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Get The Secret to a Bright and Healthy Smile

Answer 3

$r = 90;
$g = 195;
$b = 215;
     
echo sprintf("#%02X%02X%02X", $r, $g, $b);

 
 
 
/*
run:
 
#5AC3D7
 
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile