PHP code that converts a color to its inverse color

Source: Internet
Author: User

This PHP code can turn a color into the opposite color code, such as: White Turns black, blue turns yellow

  1. function Color_inverse ($color) {
  2. $color = Str_replace (' # ', ' ', $color);
  3. if (strlen ($color)! = 6) {return ' 000000 ';}
  4. $rgb = ";
  5. for ($x =0; $x <3; $x + +) {
  6. $c = 255-hexdec (substr ($color, (+ $x), 2));
  7. $c = ($c < 0)? 0:dechex ($c);
  8. $rgb. = (strlen ($c) < 2)? ' 0 '. $c: $c;
  9. }
  10. Return ' # '. $rgb;
  11. }
  12. Examples of Use:
  13. Black-White
  14. Print Color_inverse (' #000000 ');
  15. -Returns #ffffff
  16. Blue-Yellow
  17. Print Color_inverse (' #0000FF ');
  18. -#FFFF00
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Convert to, its inverse, PHP
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