- /**
- * *
- *等比缩放
- * @param unknown_type $srcImage 源图片路径
- * @param unknown_type $toFile 目标图片路径
- * @param unknown_type $maxWidth 最大宽
- * @param unknown_type $maxHeight 最大高
- * @param unknown_type $imgQuality 图片质量
- * @return unknown
- */
- function resize($srcImage,$toFile,$maxWidth = 100,$maxHeight = 100,$imgQuality=100)
- {
-
- list($width, $height, $type, $attr) = getimagesize($srcImage);
- if($width < $maxWidth || $height < $maxHeight) return ;
- switch ($type) {
- case 1: $img = imagecreatefromgif($srcImage); break;
- case 2: $img = imagecreatefromjpeg($srcImage); break;
- case 3: $img = imagecreatefrompng($srcImage); break;
- }
- $scale = min($maxWidth/$width, $maxHeight/$height); //求出绽放比例
-
- if($scale < 1) {
- $newWidth = floor($scale*$width);
- $newHeight = floor($scale*$height);
- $newImg = imagecreatetruecolor($newWidth, $newHeight);
- imagecopyresampled($newImg, $img, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
- $newName = "";
- $toFile = preg_replace("/(.gif|.jpg|.jpeg|.png)/i","",$toFile);
-
- switch($type) {
- case 1: if(imagegif($newImg, "$toFile$newName.gif", $imgQuality))
- return "$newName.gif"; break;
- case 2: if(imagejpeg($newImg, "$toFile$newName.jpg", $imgQuality))
- return "$newName.jpg"; break;
- case 3: if(imagepng($newImg, "$toFile$newName.png", $imgQuality))
- return "$newName.png"; break;
- default: if(imagejpeg($newImg, "$toFile$newName.jpg", $imgQuality))
- return "$newName.jpg"; break;
- }
- imagedestroy($newImg);
- }
- imagedestroy($img);
- return false;
- }
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