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[推荐阅读] php能不能做这种服务？
<?php
function ImgWaterMark($source,$w_pos=0,$w_img="",$w_text="",$w_font=5,$w_color="#FF0000",$w_pct){
global $imgdir;
if(!empty($source) && file_exists($source)){
$source_info = getimagesize($source);
$source_w = $source_info[0];
$source_h = $source_info[1];
switch($source_info[2]){
case 1 :
$source_img = imagecreatefromgif($source);
break;
case 2 :
$source_img = imagecreatefromjpeg($source);
break;
case 3 :
$source_img = imagecreatefrompng($source);
break;
default :
return;
}
}else{
return;
}
if(!empty($w_img) && file_exists("$imgdir/water/$w_img")){
$ifWaterImage = 1;
$water_info = getimagesize("$imgdir/water/$w_img");
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2]){
case 1 :
$water_img = imagecreatefromgif("$imgdir/water/$w_img");
break;
case 2 :
$water_img = imagecreatefromjpeg("$imgdir/water/$w_img");
break;
case 3 :
$water_img = imagecreatefrompng("$imgdir/water/$w_img");
break;
default :
return;
}
}else{
$ifWaterImage = 0;
$temp = imagettfbbox(ceil($w_font*2.5),0,"./cour.ttf",$w_text);//取得使用 TrueType 字体的文本的范围
$width = $temp[2] - $temp[6];
$height = $temp[3] - $temp[7];
unset($temp);
}
switch($w_pos){
case 0:
$wX = rand(0,($source_w - $width));
$wY = rand(0,($source_h - $height));
break;
case 1:
$wX = 5;
$wY = 5;
break;
case 2:
$wX = ($source_w - $width) / 2;
$wY = 0;
break;
case 3:
$wX = $source_w - $width;
$wY = 0;
break;
case 4:
$wX = 0;
$wY = $source_h - $height;
break;
case 5:
$wX = ($source_w - $width) / 2;
$wY = $source_h - $height;
break;
case 6:
$wX = $source_w - $width;
$wY = $source_h - $height;
break;
default:
$wX = ($source_w - $width) / 2;
$wY = ($source_h - $height) / 2;
break;
}
imagealphablending($source_img, true);
if($ifWaterImage){
imagecopymerge($source_img, $water_img, $wX, $wY, 0, 0, $width,$height,$w_pct);
}else{
if(!empty($w_color) && (strlen($w_color)==7)){
$R = hexdec(substr($w_color,1,2));
$G = hexdec(substr($w_color,3,2));
$B = hexdec(substr($w_color,5));
}else{
return;
}
imagestring($source_img,$w_font,$wX,$wY,$w_text,imagecolorallocate($source_img,$R,$G,$B));
}
P_unlink($source);
switch($source_info[2]){
case 1 :
imagegif($source_img,$source);
break;
case 2 :
imagejpeg($source_img,$source);
break;
case 3 :
imagepng($source_img,$source);
break;
default :
return;
}
if(isset($water_info)){
unset($water_info);
}
if(isset($water_img)){
imagedestroy($water_img);
}
unset($source_info);
imagedestroy($source_img);
}
?>
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