PHP生成图片

xueinsz

function randomString($length){

    //alphanumeric array widthout ambiguous chars

    $alphanumericArr  = array ('A','B','C','D','E','F','G','H','L','M','P','R','2','3','8','9');

    shuffle($alphanumericArr);

    $alphanumericArr = array_slice($alphanumericArr, 0, $length-1);

    $string = join("",$alphanumericArr);
    return $string;

}
function draw(){
        header("Content-type: image/png");
        $im = imagecreatetruecolor(400, 30);

        $background = imagecolorallocate($im, 00, 0, 0);
        $textcolor  = imagecolorallocate($im, 255,255,255);
        //imagefilledrectangle($im, 0, 0, 399, 29, $white);
        //imagettftext($image,12,0,4,18,$textcolor);
        imagettftext($im, 20, 0, 11, 21, $grey,2,randomString(5));

        imagepng($im);
        imagedestroy($im);

}
draw();
图像 “http://localhost/testing/admintool/codevolid.php” 因其本身有错无法显示。
请帮帮忙！！

iptton

br />
<b>Warning</b>:  imagettftext() [<a href='function.imagettftext'>function.imagettftext</a>]: Invalid font filename in <b>F:\easeyoo\a.php</b> on line <b>24</b><br />

.................提示信息...

iptton

imagettftext ( resource image, float size, float angle, int x, int y, int color, string fontfile, string text )

iptton

Note: This function requires both the GD library and the FreeType library.

确认安装了？