图片上打字

ob_clean();           
  
$realname = "姓名";  
$schoolname = "学校";    
$idcard = "身份证号";   
  
$image = imagecreatefrompng('certification.png');           // 证书模版图片文件的路径   
$red = imagecolorallocate($image,00,00,00);                 // 字体颜色  
  
// imageTTFText("Image", "Font Size", "Rotate Text", "Left Position","Top Position", "Font Color", "Font Name", "Text To Print");  
imageTTFText($image, 50, 0, 1110, 1025, $red, '字体路径',$realname);  
imageTTFText($image, 50, 0, 1000, 1023, $red, '字体路径', $schoolname);  
imageTTFText($image, 55, 0, 900, 810, $red, '字体路径（/usr/share/fonts/truetype/ttf-dejavu/simhei.ttf）', $idcard);  
  
 /* If you want to display the file in browser */  
header('Content-type: image/png;');  
ImagePng($image);  
imagedestroy($image);  
  
  
/* if you want to save the file in the web server */  
$filename = 'certificate_aadarsh.png';  
ImagePng($image, $filename);  
imagedestroy($image);  
  
  
/* If you want the user to download the file */  
$filename = 'certificate_aadarsh.png';  
ImagePng($image,$filename);  
header('Pragma: public');  
header('Cache-Control: public, no-cache');  
header('Content-Type: application/octet-stream');  
header('Content-Length: ' . filesize($filename));  
header('Content-Disposition: attachment; filename="' .  
 basename($filename) . '"');  
header('Content-Transfer-Encoding: binary');  
readfile($filename);  
imagedestroy($image);