显示一个黑色背景中间白框
求大神指导下!~
源码:
<?php require_once 'string.func.php'; $width = 80; $height = 28; //创建画布 $image = imagecreatetruecolor($width,$height); $white = imagecolorallocate($image,255,255,255); $black = imagecolorallocate($image,0,0,0); //用填充矩形填充画布 imagefilledrectangle($image,1,1,$width-2,$height-2,$white); $type=1; $length =4; $chars = buildRandomString($type,$length); $sess_name = "verify"; $_SESSION[$sess_name] = $chars; $fontfiles = array("SIMYOU.TTF","STSONG.TTF","msyh.ttc","msyhbd.ttc","msyhl.ttc","simsun.ttc"); for ($i = 0; $i<$length;$i++){ $size = mt_rand(14,18); $angle = mt_rand(-15,15); $x = 5+$i*$size; $y = mt_rand(20,26); $fontfiles="../fonts".$fontfiles[mt_rand(0,count($fontfiles)-1)]; $color = imagecolorallocate($image,mt_rand(50,90),mt_rand(80,200),mt_rand(90,180)); $text = substr($chars,$i,1); imagettftext($image,$size,$angle,$x,$y,$color,$fontfiles,$text); } header("content-type:image/gif"); imagegif($image); imagedestroy($image);
<?php function buildRandomString($type=1,$length=4){ if ($type == 1) { $chars = join ( "", range ( 0, 9 ) ); } elseif ($type == 2) { $chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ) ) ); } elseif ($type == 3) { $chars = join ( "", array_merge ( range ( "a", "z" ), range ( "A", "Z" ), range ( 0, 9 ) ) ); } if ($length > strlen ( $chars )) { exit ( "字符串长度不够" ); } $chars = str_shuffle ( $chars ); return substr ( $chars, 0, $length ); }