<?php
check_codo();
//$img = imagecreate($width,$height);//创建画布并且传入两个变量宽高
function check_codo($width = 100,$height = 50,$num = 4, $type = 'jpeg'){
$img = imagecreate($width, $height);
$string = '';
for ($i = 0;$i < $num;$i++) {
$rand = mt_rand(0,2);
switch ($rand) {
case 0:
$ascll = mt_rand(48,57);//0-9
break;
case 1:
$ascll = mt_rand(65,90);//A-Z
break;
case 2:
$ascll = mt_rand(97,122);//a-z
break;
}
$string = sprintf('$c',$ascll);
}
//背景颜色
imagefilledrectangle($img, 0, 0, $width, $height, randBg($img));
//干扰元素
for ($i=0; $i < 50; $i++) {
imagesetpixel($img, mt_rand(0,$width),mt_rand(0,$height),randPix($img));
# code...
}
//写字
for ($i=0; $i < $num; $i++) {
$x = floor($width / $num) * $i+2;
}
}
?>
