3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?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
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 - 7.0.14
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 - 4.4.9
Warning: Missing argument 1 for getcontrastyiq() in /in/8SE2J on line 2