<?php

?? ?session_start();


?? ?$image = imagecreatetruecolor(200,60);
?? ?$bgcolor = imagecolorallocate($image,255,255,255);
?? ?imagefill($image,0,0,$bgcolor);

?? ?/*for($i=0;$i<4;$i++){
?? ?$fontsize = 6;
?? ?$fontcolor = imagecolorallocate($image,rand(0,120),rand(0,120),rand(0,120));
?? ?$fontcontent = rand(0,9);
?? ?
?? ?$x = ($i*100/4)+rand(5,10);
?? ?$y = rand(5,10);


?? ?imagestring($image,$fontsize,$x,$y,$fontcontent,$fontcolor);
?? ?}*/


$fontface = 'FZYTK.TTF';
$str = "速度發(fā)動(dòng)機(jī)換方關(guān)鍵時(shí)刻";
$strdb =str_split($str,3);
$captch_code ='';

for( $i=0 ; $i<4; $i++ ){

$fontcolor = imagecolorallocate( $image ,rand(0,120),rand(0,120),rand(0,120));
?? ?$index = rand(0,count($strdb)-1);
?? ?$cn = $strdb[ $index ];
?? ?$captch_code=$cn;

imagettftext($image,mt_rand(20,24),mt_rand(-60,60),(40*$i+20),mt_rand(30,35),$fontcolor,$fontface,$cn);
}
?? ?$_SESSION[' $authcode ']=$captch_code;


?? ?for($i=0;$i<200;$i++){
?? ?$pointcolor = imagecolorallocate( $image ,rand(50,200),rand(50,200),rand(50,200));
?? ?imagesetpixel($image,rand(1,199),rand(1,59),$pointcolor);
?? ?}
?? ?for($i=0;$i<3;$i++){
?? ?$linecolor = imagecolorallocate($image,rand(80,220),rand(80,220),rand(80,220));
?? ?imageline($image,rand(1,199),rand(1,59),rand(1,199),rand(1,59),$linecolor);

}

?? ?header('content-type: image/png');
?? ?imagepng($image);



?? ?//end
?? ?imagedestroy($image);