Php to convert the color to its reversed method, php to convert the color to its

Php to convert the color to its reversed method, php to convert the color to its

This article describes how to convert the color of php to its reversed color. Share it with you for your reference. The specific analysis is as follows:

This php code converts a color to the opposite color encoding, for example, white to black, and blue to yellow.

Function color_inverse ($ color) {$ color = str_replace ('#', '', $ color); if (strlen ($ color )! = 6) {return '000000';} $ rgb = ''; for ($ x = 0; $ x <3; $ x ++) {$ c = 255-hexdec (substr ($ color, (2 * $ x), 2); $ c = ($ c <0 )? 0: dechex ($ c); $ rgb. = (strlen ($ c) <2 )? '0 '. $ c: $ c;} return '#'. $ rgb;} // example: // black-> whiteprint color_inverse ('#000000 '); // --> returns # ffffff // blue-> yellowprint color_inverse ('# 0000FF'); // --> # FFFF00

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