/ * * * @Param $ srcImage original image path * @param $ toFile after clipping path picture * @param int $ maxWidth maximum cutting width * @param int $ maxHeight after cutting the maximum height * @param int $ imgQuality picture quality @return BOOL * | String | void * / function a resize ( $ srcImage , $ of toFile , $ maxWidth = 640, $ the maxHeight = 480, $ imgQuality = 100 ) { List ( $ width , $ height , $ type , $ attr ) = getimagesize ( $ srcImage ); IF ($width < $maxWidth || $height < $maxHeight) return ; switch ($type) {//判断图片类别 case 1: $img = imagecreatefromgif($srcImage); break; case 2: $img = imagecreatefromjpeg($srcImage); break; case 3: $img = imagecreatefrompng($srcImage); break; } $scale = min($maxWidth/$width, $maxHeight/$height); 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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