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<?php function getColor($rgb) { $colors = array(BLUE =>0x0a9ef3, RED => 0xea0a2f, GREEN => 0x336633); $largestDiff = 0; $closestColor = ""; foreach ($colors as $name => $rgbColor) { if (!isset($smallestDiff)) { $smallestDiff = colorDiff($rgbColor,$rgb); $closestColor = $name; } else if (colorDiff($rgbColor,$rgb) < $smallestDiff) { $smallestDiff = colorDiff($rgbColor,$rgb); $closestColor = $name; } } return $closestColor; } function colorDiff($rgb1,$rgb2) { // do the math on each tuple $red1 = hexdec(substr($rgb1,0,2)); $green1 = hexdec(substr($rgb1,2,2)); $blue1 = hexdec(substr($rgb1,4,2)); $red2 = hexdec(substr($rgb2,0,2)); $green2 = hexdec(substr($rgb2,2,2)); $blue2 = hexdec(substr($rgb2,4,2)); return abs($red1 - $red2) + abs($green1 - $green2) + abs($blue1 - $blue2) ; } $color = '336633'; $closestmatch = getColor($color); echo $closematch; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "BLUE" in /in/4UXYT:6 Stack trace: #0 /in/4UXYT(46): getColor('336633') #1 {main} thrown in /in/4UXYT on line 6
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Warning: Use of undefined constant BLUE - assumed 'BLUE' (this will throw an Error in a future version of PHP) in /in/4UXYT on line 6 Warning: Use of undefined constant RED - assumed 'RED' (this will throw an Error in a future version of PHP) in /in/4UXYT on line 6 Warning: Use of undefined constant GREEN - assumed 'GREEN' (this will throw an Error in a future version of PHP) in /in/4UXYT on line 6 Notice: Undefined variable: closematch in /in/4UXYT on line 47
Output for 7.3.32 - 7.3.33, 7.4.26
Warning: Use of undefined constant BLUE - assumed 'BLUE' (this will throw an Error in a future version of PHP) in /in/4UXYT on line 6 Warning: Use of undefined constant RED - assumed 'RED' (this will throw an Error in a future version of PHP) in /in/4UXYT on line 6 Warning: Use of undefined constant GREEN - assumed 'GREEN' (this will throw an Error in a future version of PHP) in /in/4UXYT on line 6
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant BLUE - assumed 'BLUE' in /in/4UXYT on line 6 Notice: Use of undefined constant RED - assumed 'RED' in /in/4UXYT on line 6 Notice: Use of undefined constant GREEN - assumed 'GREEN' in /in/4UXYT on line 6 Notice: Undefined variable: closematch in /in/4UXYT on line 47
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Use of undefined constant BLUE - assumed 'BLUE' in /in/4UXYT on line 6 Notice: Use of undefined constant RED - assumed 'RED' in /in/4UXYT on line 6 Notice: Use of undefined constant GREEN - assumed 'GREEN' in /in/4UXYT on line 6 Notice: Undefined variable: closematch in /in/4UXYT on line 47

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