Question

如果图像尺寸超过50 kb，如何调整图像大小。

这是我目前的代码。

$sess=66666;
$images = $_FILES["photoimg"]["tmp_name"];
$new_images = "$sess.gif";
$width=200; 
//*** Fix Width & Heigh (Autu caculate) ***//
$size=GetimageSize($images);
$height=round($width*$size[1]/$size[0]);
if($size[2] == 1) {
    $images_orig = imagecreatefromgif($images);
} else if($size[2] == 2) {
    $images_orig = imagecreatefromjpeg($images);
}else if($size[2] == 3) {
    $images_orig = imagecreatefrompng($images); 
}
$photoX = ImagesX($images_orig);
$photoY = ImagesY($images_orig);
$images_fin = ImageCreateTrueColor($width, $height);
ImageCopyResampled($images_fin, $images_orig, 0, 0, 0, 0, $width+1, $height+1, $photoX, $photoY);
Imagejpeg($images_fin,"images/".$new_images);
ImageDestroy($images_orig);
ImageDestroy($images_fin);

Answer 1

使用filesize()。

$sess=66666;
$images = $_FILES["photoimg"]["tmp_name"];
$new_images = "$sess.gif";
$maxsize = 50 * 1024; // 50Kb

if( filesize($images) > $maxsize) {
    $width=200; 
    //*** Fix Width & Heigh (Autu caculate) ***//
    $size=getimagesize($images);
    $height=round($width*$size[1]/$size[0]);
    if($size[2] == 1) {
        $images_orig = imagecreatefromgif($images);
    } else if($size[2] == 2) {
        $images_orig = imagecreatefromjpeg($images);
    }else if($size[2] == 3) {
        $images_orig = imagecreatefrompng($images); 
    }
    $photoX = imagesx($images_orig);
    $photoY = imagesy($images_orig);
    $images_fin = imagecreatetruecolor($width, $height);
    imagecopyresampled($images_fin, $images_orig, 0, 0, 0, 0, $width+1, $height+1,         $photoX, $photoY);
    imagejpeg($images_fin,"images/".$new_images);
    imagedestroy($images_orig);
    imagedestroy($images_fin);
} else {
    imagejpeg($images,"images/".$new_images);
}

Answer 2

测试文件大小如下：

$maxSize = 50 * 1024;

$sess=66666;
$images = $_FILES["photoimg"]["tmp_name"];

if(filesize($images) > $maxSize){

    $sess=66666;
    $images = $_FILES["photoimg"]["tmp_name"];
    $new_images = "$sess.gif";
    $width=200; 
    //*** Fix Width & Heigh (Autu caculate) ***//
    $size=GetimageSize($images);
    $height=round($width*$size[1]/$size[0]);
    if($size[2] == 1) {
        $images_orig = imagecreatefromgif($images);
    } else if($size[2] == 2) {
        $images_orig = imagecreatefromjpeg($images);
    }else if($size[2] == 3) {
        $images_orig = imagecreatefrompng($images); 
    }
    $photoX = ImagesX($images_orig);
    $photoY = ImagesY($images_orig);
    $images_fin = ImageCreateTrueColor($width, $height);
    ImageCopyResampled($images_fin, $images_orig, 0, 0, 0, 0, $width+1, $height+1, $photoX, $photoY);
    Imagejpeg($images_fin,"images/".$new_images);
    ImageDestroy($images_orig);
    ImageDestroy($images_fin);

}

如果filesize超过50kb，请调整图像大小

2 个答案: