调整图像尺寸代码,PHP代码库,德仔网

代码语言

代码分类

【PHP】调整图像尺寸

作者:Dezai.CN / 发布于2013/8/28/ 608


	/**********************
	*@filename - path to the image
	*@tmpname - temporary path to thumbnail
	*@xmax - max width
	*@ymax - max height
	*/
	function resize_image($filename, $tmpname, $xmax, $ymax)
	{
	$ext = explode(".", $filename);
	$ext = $ext[count($ext)-1];

	if($ext == "jpg" || $ext == "jpeg")
	$im = imagecreatefromjpeg($tmpname);
	elseif($ext == "png")
	$im = imagecreatefrompng($tmpname);
	elseif($ext == "gif")
	$im = imagecreatefromgif($tmpname);

	$x = imagesx($im);
	$y = imagesy($im);

	if($x <= $xmax && $y <= $ymax)
	return $im;

	if($x >= $y) {
	$newx = $xmax;
	$newy = $newx * $y / $x;
	}
	else {
	$newy = $ymax;
	$newx = $x / $y * $newy;
	}

	$im2 = imagecreatetruecolor($newx, $newy);
	imagecopyresized($im2, $im, 0, 0, 0, 0, floor($newx), floor($newy), $x, $y);
	return $im2;
	}

试试其它关键字

　调整图像尺寸　

同语言下

可能有用的

Dezai.CN贡献的其它代码(4037)