Question

尝试使用以下代码将图片上传到服务器以下是使用下面给出的代码完成的

上传文件重命名
我需要的是我需要使用以下代码缩小图像尺寸

这是代码

 $file_name = $HTTP_POST_FILES['ufile']['name'];
 $random_digit = md5(rand() * time());
 $new_file_name = $random_digit . $file_name;
 $path = "upload/" . $new_file_name;
 if ($ufile != none) {
    if (copy($HTTP_POST_FILES['ufile']['tmp_name'], $path)) {
        echo "Successful<BR/>";
        echo "File Name :" . $new_file_name . "<BR/>";
        echo "File Size :" . $HTTP_POST_FILES['ufile']['size'] . "<BR/>";
        echo "File Type :" . $HTTP_POST_FILES['ufile']['type'] . "<BR/>";
    } else {
        echo "Error";
    }
 }

如何使用给定代码缩小图像大小

Answer 1

当然，它运作正常。我在PHP中使用这个类：

<?php

function thumbnail( $img, $source, $dest, $maxw, $maxh ) {      
    $jpg = $source.$img;

    if( $jpg ) {
        list( $width, $height  ) = getimagesize( $jpg ); //$type will return the type of the image
        $source = imagecreatefromjpeg( $jpg );

        if( $maxw >= $width && $maxh >= $height ) {
            $ratio = 1;
        }elseif( $width > $height ) {
            $ratio = $maxw / $width;
        }else {
            $ratio = $maxh / $height;
        }

        $thumb_width = round( $width * $ratio ); //get the smaller value from cal # floor()
        $thumb_height = round( $height * $ratio );

        $thumb = imagecreatetruecolor( $thumb_width, $thumb_height );
        imagecopyresampled( $thumb, $source, 0, 0, 0, 0, $thumb_width, $thumb_height, $width, $height );

        $path = $dest.$img."_thumb.jpg";
        imagejpeg( $thumb, $path, 75 );
    }
    imagedestroy( $thumb );
    imagedestroy( $source );
}

＆GT;

imagejpeg( $thumb, $path, 75 );

是您在上传后想要的图像大小和质量的位置。

使用PHP脚本调用：

if( isset( $_FILES['img-content'] ) ) {
$img = str_replace( " ","_",$_FILES['img-content']['name'] );
move_uploaded_file( $_FILES['img-content']['tmp_name'], "../../images/content/".$img );
$source = "../../images/content/";
$dest = "../../images/thumb/";
thumbnail( $img, $source, $dest, 480, 400 );

使用以下用于上传图像的PHP代码上传时缩小图像大小

1 个答案: