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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 git.master, git.master_jit, rfc.property-hooks
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.

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