php create sprite

根据文件夹内的图片生成 sprite合成图

$srcdir='./image/';
$prefix="pic11_";
$dst="image";
$imagedir=scandir($srcdir);
array_shift($imagedir);
array_shift($imagedir);
$width=0;
$height=0;
foreach ($imagedir as $key => $value) {
	$picinfo=getimagesize($srcdir.$value);
	$width=$picinfo[0]+$width;
	if ($height<$picinfo[1]) {
		$height=$picinfo[1];
	}
}
$image=imagecreatetruecolor($width,$height);
imagesavealpha($image, true);
$color=imagecolorallocatealpha($image,0,0,0,127) ;
imagefill($image, 0, 0, $color);
$width=0;
$height=0;
$css="";
foreach ($imagedir as $key => $value) {
	$picinfo=getimagesize($srcdir.$value);
	$im=imagecreatefrompng($srcdir.$value); 						//创建image
	imagecopymerge($image, $im, $width, 0, 0, 0, $picinfo[0], $picinfo[1],100);
	$picname=pathinfo($srcdir.$value);
	$css=".".$prefix.$picname['filename']."{height:".$picinfo[0]."px;width:".$picinfo[1]."px;background-position: -".$width."px 0px;}".$css;
	$width=$width+$picinfo[0];
	imagedestroy($im); 												//销毁image
}
$css=$css."[class*=".$prefix."]{background-image:url('image.png');}}";
$css=$css.".".$prefix."{background-image:url('image.png');}";		//兼容ie 系列
file_put_contents("./".$dst.'.css',$css);
imagepng($image,"./".$dst.'.png');
imagedestroy($image);
?>

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