使用以下用于上传图像的PHP代码上传时缩小图像大小 [英] reduce image size while uploading using the following PHP code used to upload image

问题描述

尝试使用以下代码将图像上传到服务器
以下使用以下给定代码完成以下操作

Am trying to upload image to server using the following code Following are done with the given code below

• 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大小
  

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";
    }
 }

如何使用给定代码减少图像尺寸

how to reduce image size with the given code

推荐答案

当然，它运作正常。我在PHP中使用这个类：

Sure, it works fine. I use this class in PHP:

<?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 );
}

？>

imagejpeg( $thumb, $path, 75 );

是您在上传后想要的图片大小和质量的位置。

is where how much you want the size and quality of the image after uploading.

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 );

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