基于HTML实现其他类别网站_PHP验证码图片生成程序_sysimg(HTML源码+数据集+项目使用说明+毕业设计).rar

<?php //小猪会气功 session_start(); session_register('code'); $width = "70";//图片宽 $height = "25";//图片高 $len = "4";//生成几位验证码 $bgcolor = "#ffffff";//背景色 $noise = true;//生成杂点 $noisenum = 200;//杂点数量 $border = false;//边框 $bordercolor = "#000000"; $image = imageCreate($width, $height); $back = getcolor($bgcolor); imageFilledRectangle($image, 0, 0, $width, $height, $back); $size = $width/$len; if($size>$height) $size=$height; $left = ($width-$len*($size+$size/10))/$size; for ($i=0; $i<$len; $i++) { $randtext = rand(0, 9); $code .= $randtext; $textColor = imageColorAllocate($image, rand(0, 100), rand(0, 100), rand(0, 100)); $font = rand(1,4).".ttf"; $randsize = rand($size-$size/10, $size+$size/10); $location = $left+($i*$size+$size/10); imagettftext($image, $randsize, rand(-18,18), $location, rand($size-$size/10, $size+$size/10), $textColor, $font, $randtext); } if($noise == true) setnoise(); $_SESSION['code'] = $code; $bordercolor = getcolor($bordercolor); if($border==true) imageRectangle($image, 0, 0, $width-1, $height-1, $bordercolor); header("Content-type: image/png"); imagePng($image); imagedestroy($image); function getcolor($color) { global $image; $color = eregi_replace ("^#","",$color); $r = $color[0].$color[1]; $r = hexdec ($r); $b = $color[2].$color[3]; $b = hexdec ($b); $g = $color[4].$color[5]; $g = hexdec ($g); $color = imagecolorallocate ($image, $r, $b, $g); return $color; } function setnoise() { global $image, $width, $height, $back, $noisenum; for ($i=0; $i<$noisenum; $i++){ $randColor = imageColorAllocate($image, rand(0, 255), rand(0, 255), rand(0, 255)); imageSetPixel($image, rand(0, $width), rand(0, $height), $randColor); } } ?>