图片验证码

<?php header ( 'Content-type: image/png' ); /** * Created by coder meng. * User: coder meng * Date: 2016/4/9 16:05 */ // 1. 创建画布 $width = 100 ; $height = 30 ; $im = imagecreatetruecolor ( $width , $height ); //2. 设置颜色 $red = imagecolorallocate ( $im , 255 , 0 , 0 ); $green = imagecolorallocate ( $im , 0 , 255 , 0 ); $blue = imagecolorallocate ( $im , 0 , 0 , 255 ); $white = imagecolorallocate ( $im , 192 , 220 , 192 ); $color = imagecolorallocate ( $im , rand ( 0 , 255 ), rand ( 0 , 255 ), rand ( 0 , 255 )); //3. 填充颜色 imagefill ( $im , 0 , 0 , $white ); for ( $i = 0 ; $i < 100 ; $i ++) { // 画点 imagesetpixel ( $im , rand ( 0 , $width ), rand ( 0 , $height ), $color ); // 画线 } for ( $j = 0 ; $j < 10 ; $j ++) { imageline ( $im , rand ( 0 , $width ), rand ( 0 , $height ), rand ( 0 , $width ), rand ( 0 , $height ), $color ); } $text = rand ( 1000 , 9999 ); // Replace path by your own font path $font = 'consola.ttf' ; // Add some shadow to the text imagettftext ( $im , 20 , 0 , 11 , 21 , $color , $font , $text ); imagepng ( $im ); //5 关闭资源 imagedestroy ( $im );