【发布时间】：2020-03-25 15:55:29
【问题描述】：
我使用以下代码上传、重命名、压缩、创建缩略图一切正常，最近我注意到在创建拇指时，它也会为以前上传的图像创建缩略图的新副本（为上传和上传图片创建缩略图）
问题：
提交表单时，它会创建用于上传图片和上传图片（旧版图片文件）的 crates thumb。
我该如何解决这个问题
if (!empty($_POST)) {
if (isset($_FILES['files'])) {
$uploadedFiles = array();
foreach ($_FILES['files']['tmp_name'] as $key => $tmp_name) {
$errors = array();
$file_name = md5(uniqid("") . time());
$file_size = $_FILES['files']['size'][$key];
$file_tmp = $_FILES['files']['tmp_name'][$key];
$file_type = $_FILES['files']['type'][$key];
if ($file_type == "image/gif") {
$sExt = ".gif";
} elseif ($file_type == "image/jpeg" || $file_type == "image/pjpeg") {
$sExt = ".jpg";
} elseif ($file_type == "image/png" || $file_type == "image/x-png") {
$sExt = ".png";
}
if (!in_array($sExt, array('.gif', '.jpg', '.png'))) {
$errors[] = "Image types alowed are (.gif, .jpg, .png) only!";
}
if ($file_size > 2097152000) {
$errors[] = 'File size must be less than 2 MB';
}
$desired_dir = "$_SERVER[DOCUMENT_ROOT]/upload/file/";
if (empty($errors)) {
if (is_dir($desired_dir) == false) {
mkdir("$desired_dir", 0700);
}
if
(move_uploaded_file($file_tmp, "$desired_dir/" . $file_name . $sExt)) {
$uploadedFiles[$key] = array($file_name . $sExt, 1);
} else {
echo "Couldn't upload file " . $_FILES['files']['tmp_name'][$key];
$uploadedFiles[$key] = array($_FILES['files']['tmp_name'][$key], 0);
}
} else {
}
}
foreach ($uploadedFiles as $key => $row) {
if (!empty($row[1])) {
$codestr = '$file' . ($key + 1) . ' = $row[0];';
eval($codestr);
} else {
$codestr = '$file' . ($key + 1) . ' = NULL;';
eval($codestr);
}
}
}
$orig_directory = "$desired_dir";
$thumb_directory = "$_SERVER[DOCUMENT_ROOT]/upload/thumb/";
$dir_handle = opendir($orig_directory);
if ($dir_handle > 1) {
$allowed_types = array('jpg', 'jpeg', 'gif', 'png');
$file_type = array();
$ext = '';
$title = '';
$i = 0;
while ($file_name = readdir($dir_handle)) {
if ($file_name == '.' || $file_name == '..') {
continue;
}
$file_type = \explode('.', $file_name);
$ext = strtolower(array_pop($file_type));
$title1 = implode('.', $file_type);
$title = htmlspecialchars($title1);
if (in_array($ext, $allowed_types)) {
$nw = 125;
$nh = 90;
$source = "$desired_dir{$file_name}";
$stype1 = explode(".", $source);
$stype = $stype1[count($stype1) - 1];
$dest = "$_SERVER[DOCUMENT_ROOT]/upload/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;
}
$dimg = resizePreservingAspectRatio($simg, $nw, $nh);
imagepng($dimg, $dest);
compress($source, "$desired_dir/" . $file_name, 50);
}
}closedir($dir_handle);
}
$stmt = $conn->prepare("INSERT INTO allpostdata(im1, im2, im3, im4)"
. " VALUES (:im1, :im2, :im3, :im4)");
$stmt->bindParam(':im1', $file1, PDO::PARAM_STR, 100);
$stmt->bindParam(':im2', $file2, PDO::PARAM_STR, 100);
$stmt->bindParam(':im3', $file3, PDO::PARAM_STR, 100);
$stmt->bindParam(':im4', $file4, PDO::PARAM_STR, 100);
if ($stmt->execute()) {
header('Location: /post/price_plan.php');
}exit;
}
function compress($source, $destination, $quality) {
$info = getimagesize($source);
if ($info['mime'] == 'image/jpeg') {
$image = imagecreatefromjpeg($source);
} elseif ($info['mime'] == 'image/gif') {
$image = imagecreatefromgif($source);
} elseif ($info['mime'] == 'image/png') {
$image = imagecreatefrompng($source);
}
imagejpeg($image, $destination, $quality);
return $destination;
}
function resizePreservingAspectRatio($img, $targetWidth, $targetHeight) {
$srcWidth = imagesx($img);
$srcHeight = imagesy($img);
$srcRatio = $srcWidth / $srcHeight;
$targetRatio = $targetWidth / $targetHeight;
if (($srcWidth <= $targetWidth) && ($srcHeight <= $targetHeight)) {
$imgTargetWidth = $srcWidth;
$imgTargetHeight = $srcHeight;
} else if ($targetRatio > $srcRatio) {
$imgTargetWidth = (int) ($targetHeight * $srcRatio);
$imgTargetHeight = $targetHeight;
} else {
$imgTargetWidth = $targetWidth;
$imgTargetHeight = (int) ($targetWidth / $srcRatio);
}
$targetImg = imagecreatetruecolor($targetWidth, $targetHeight);
$targetTransparent = imagecolorallocate($targetImg, 255, 0, 255);
imagefill($targetImg, 0, 0, $targetTransparent);
imagecolortransparent($targetImg, $targetTransparent);
imagecopyresampled($targetImg, $img, 0, 0, 0, 0, $targetWidth, $targetHeight, $srcWidth, $srcHeight);
return $targetImg;
}
赏金编辑
如果有什么好的更快的功能请做。
我只需要上传、重命名、压缩、创建缩略图并将名称保存到数据库
【问题讨论】：
-
还为以前上传的图片复制缩略图（也为上传和上传的图片创建缩略图）你的意思是如果你上传多个文件，最后一张图片会覆盖以前创建的缩略图？
-
如果我理解正确的话，这个脚本不仅在处理提交的图片，而且还重新处理之前上传的图片，已经保存在目录中，你要防止这。对吗？
-
@jagad89 是的，每次提交表单时它都会覆盖文件。
-
@sanojlawrence 我建议你花点时间深入研究一下。它有很多工具和现有框架，可以用最少的代码轻松完成此类任务
-
您应该匹配
while中提交的图像 ($_FILES)。因为您目前正在处理$thumb_directory中的每张图片。我同意@Tschallacka 的观点，通过一些重构，您的代码可以更具可读性和可维护性。
标签： php thumbnails