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<?php function getContrastYIQ($hexcolor){ $r = hexdec(substr($hexcolor,0,2)); $g = hexdec(substr($hexcolor,2,2)); $b = hexdec(substr($hexcolor,4,2)); $yiq = (($r*299)+($g*587)+($b*114))/1000; return ($yiq >= 128) ? 'black' : 'white'; } $color = getContrastYIQ(); if(empty($color)) { echo "Empty"; }
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: Too few arguments to function getContrastYIQ(), 0 passed in /in/8SE2J on line 10 and exactly 1 expected in /in/8SE2J:2 Stack trace: #0 /in/8SE2J(10): getContrastYIQ() #1 {main} thrown in /in/8SE2J on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Warning: Missing argument 1 for getContrastYIQ(), called in /in/8SE2J on line 10 and defined in /in/8SE2J on line 2 Notice: Undefined variable: hexcolor in /in/8SE2J on line 3 Notice: Undefined variable: hexcolor in /in/8SE2J on line 4 Notice: Undefined variable: hexcolor in /in/8SE2J on line 5
Output for 5.0.0 - 5.0.5
Warning: Missing argument 1 for getContrastYIQ() in /in/8SE2J on line 2
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Warning: Missing argument 1 for getcontrastyiq() in /in/8SE2J on line 2
preferences:
212.6 ms | 402 KiB | 315 Q