Php random verification code php generates random verification code (text)

Php random verification code php generates random verification code (text)

For ($ I = 0; $ I <6; $ I ++ ){ $ _ Md_color = imagecolorallocate ($ _ img, mt_rand (0,255), mt_rand (0,255), mt_rand (0,255 )); Imageline ($ _ img, mt_rand (0, 75), mt_rand (0, 75), mt_rand (0, 75), mt_rand (0, 75), $ _ md_color ); } // Random snowflake For ($ I = 0; I I <100; $ I ++ ){ $ _ Md_color = imagecolorallocate ($ _ img, mt_rand (200,255), mt_rand (200,255), mt_rand (200,255 )); Imagestring ($ _ img, 1, mt_rand (1, $ _ width), mt_rand (1, $ _ height), '*', $ _ md_color ); } // Black border $ _ Black = imagecolorallocate ($ _ img, 0, 0, 0 ); Imagerectangle ($ _ img, 0, 0, $ _ width-1, $ _ height-1, $ _ black ); // Output the verification code For ($ I = 0; $ I $ _ Mt_color = imagecolorallocate ($ _ img, mt_rand (0,100), mt_rand (0,150), mt_rand (0,200 )); Imagestring ($ _ img, mt_rand (3, 5), $ I * $ _ width/4 + mt_rand (1, 10), mt_rand (1, $ _ height/2 ), $ _ SESSION ['code'] [$ I], $ _ mt_color ); } Header ('content-Type: image/png '); Imagepng ($ _ img ); // Destroy Imagedestroy ($ _ img ); ?>