【发布时间】：2014-11-06 13:59:02
【问题描述】：
我正在从单个输入上传多个图像并创建拇指表单所有上传的图像但是当我运行代码时我只得到黑色图像但原始图像与上传的图像相同
<?php
$newname = md5(rand() * time());
$file1 = isset($_FILES['files']['name'][0]) ? $_FILES['files']['name'][0] : null;
$file2 = isset($_FILES['files']['name'][1]) ? $_FILES['files']['name'][1] : null;
$file3 = isset($_FILES['files']['name'][2]) ? $_FILES['files']['name'][2] : null;
$file4 = isset($_FILES['files']['name'][3]) ? $_FILES['files']['name'][3] : null;
$file5 = isset($_FILES['files']['name'][4]) ? $_FILES['files']['name'][4] : null;
if (isset($_FILES['files'])) {
$errors = array();
foreach ($_FILES['files']['tmp_name'] as $key => $tmp_name) {
$file_name = $key . $_FILES['files']['name'][$key];
$file_size = $_FILES['files']['size'][$key];
$file_tmp = $_FILES['files']['tmp_name'][$key];
$file_type = $_FILES['files']['type'][$key];
if ($file_size > 2097152000) {
$errors[] = 'File size must be less than 2 MB';
}
$desired_dir = "user_data/";
if (empty($errors) == true) {
if (is_dir($desired_dir) == false) {
mkdir("$desired_dir", 0700); // Create directory if it does not exist
}
if (is_dir("$desired_dir/" . $file_name) == false) {
move_uploaded_file($file_tmp, "$desired_dir/" . $newname . $file_name);
} else { // rename the file if another one exist
$new_dir = "$desired_dir/" . $newname . $file_name;
rename($file_tmp, $new_dir);
}
} else {
print_r($errors);
}
}
if (empty($error)) {
echo "FILE : $file1<br>";
echo "FILE : $file2<br>";
echo "FILE : $file3<br>";
echo "FILE : $file4<br>";
echo "FILE : $file5<br>";
}
}
$orig_directory = "$desired_dir"; //Full image folder
$thumb_directory = "thumb/"; //Thumbnail folder
/* Opening the thumbnail directory and looping through all the thumbs: */
$dir_handle = @opendir($orig_directory); //Open Full image dirrectory
if ($dir_handle > 1){ //Check to make sure the folder opened
$allowed_types=array('jpg','jpeg','gif','png');
$file_type=array();
$ext='';
$title='';
$i=0;
while ($file_name = @readdir($dir_handle)) {
/* Skipping the system files: */
if($file_name=='.' || $file_name == '..') continue;
$file_type = explode('.',$file_name); //This gets the file name of the images
$ext = strtolower(array_pop($file_type));
/* Using the file name (withouth the extension) as a image title: */
$title = implode('.',$file_type);
$title = htmlspecialchars($title);
/* If the file extension is allowed: */
if(in_array($ext,$allowed_types)) {
/* If you would like to inpute images into a database, do your mysql query here */
/* The code past here is the code at the start of the tutorial */
/* Outputting each image: */
$nw = 100;
$nh = 100;
$source = "$desired_dir{$file_name}";
$stype = explode(".", $source);
$stype = $stype[count($stype)-1];
$dest = "thumb/{$file_name}";
$size = getimagesize($source);
$w = $size[0];
$h = $size[1];
switch($stype) {
case 'gif':
$simg = imagecreatefromgif($source);
break;
case 'jpg':
$simg = imagecreatefromjpeg($source);
break;
case 'png':
$simg = imagecreatefrompng($source);
break;
}
$dimg = imagecreatetruecolor($nw, $nh);
$wm = $w/$nw;
$hm = $h/$nw;
$h_height = $nh/2;
$w_height = $nw/2;
if($w> $h) {
$adjusted_width = $w / $hm;
$half_width = $adjusted_width / 2;
$int_width = $w / $hm;
imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);
} else {
imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);
}
imagejpeg($dimg,$dest,100);
}
}
/* Closing the directory */
@closedir($dir_handle);
}
?>
当我运行代码时，这是如何输出文件的，不知道发生了什么，有人可以帮我找到错误吗 为所有类型的图像格式创建黑色拇指
当我从上面的代码中删除以下代码时，它的工作原理是这段代码的作用
if($w> $h) {
$adjusted_width = $w / $hm;
$half_width = $adjusted_width / 2;
$int_width = $w / $hm;
imagecopyresampled($dimg,$simg,-$int_width,0,0,0,0,$adjusted_width,$nw,$nh,$w,$h);
} else
【问题讨论】：
-
您的文件有哪些文件扩展名？
-
$source="$desired_dir{$file_name}" ???为什么不 $source = $desired_dir."/".$file_name;
-
@RaphaelMüller 我有 JPG、PNG、GIF 所有图像格式
-
我在您的交换机中看到了。但是你只检查 jpg 如果扩展名是 jpeg 你会得到一个黑色的拇指
-
抱歉转储问题，但是您在发送原始文件时是否发送大写字母？比如JPG、PNG等...
标签： php image thumbnails