两种上传图片的方法都已经验证
首先index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="action.php" method="post" enctype="multipart/form-data">
请选择您要上传的文件：<input type="file" name='myFile1' />
<input type="submit" value="上传文件" />
</form>
</body>
</html>
action.php
<?php
header('content-type:text/html;charset=utf-8');
require_once 'upload.php';
$u=new upload('myFile1','500000','upload');
$a=$u->uploads();
$c=$u->Smallimg();
echo "<a href='$a'><img src='$c' /></a>";
upload.php
<?php
class upload
{
protected $filename;//文件名
protected $fileMine;//文件上传类型
protected $filepath;//文件上传路径
protected $filemax;//文件上传大小
protected $fileExt;//文件上传格式
protected $fileerror;//文件出错设置
protected $fileflag;//文件检测
protected $fileinfo; //FILES
protected $ext; //文件扩展
protected $path;
//文件上传
public function __construct($filename = "N_File", $filemax = 5000000, $filepath = "Notices", $fileflag = true, $fileExt = array('gif', 'jpeg', 'pjpeg', 'jpg', 'png'), $fileMine = array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/jpg', 'image/png'))
{
$this->filename = $filename;
$this->fileinfo = $_FILES[$this->filename];
$this->filemax = $filemax;
$this->filepath = $filepath;
$this->fileflag = $fileflag;
$this->fileExt = $fileExt;
$this->fileMine = $fileMine;
//var_dump($this->filename);
}
//错误判断
public function UpError()
{
if ($this->fileinfo['error'] > 0) {
switch ($this->fileinfo['error']) {
case 1:
$this->fileerror = "上传文件大小超过服务器允许上传的最大值，php.ini中设置upload_max_filesize选项限制的值 ";
break;
case 2:
$this->fileerror = "上传文件大小超过HTML表单中隐藏域MAX_FILE_SIZE选项指定的值";
break;
case 3:
$this->fileerror = "文件部分被上传";
break;
case 4:
$this->fileerror = "没有选择上传文件";
break;
case 5:
$this->fileerror = "未找到临时目录";
break;
case 6:
$this->fileerror = "文件写入失败";
break;
case 7:
$this->fileerror = "php文件上传扩展没有打开";
break;
case 8:
$this->fileerror = "";
break;
}
return false;
}
return true;
}
//检测文件类型
public function UpMine()
{
if (!in_array($this->fileinfo['type'], $this->fileMine)) {
$this->error = "文件上传类型不对";
return false;
}
return true;
}
//检测文件格式
public function UpExt()
{
$this->ext = pathinfo($this->fileinfo['name'], PATHINFO_EXTENSION);
//var_dump($ext);
if (!in_array($this->ext, $this->fileExt)) {
$this->fileerror = "文件格式不对";
return false;
}
return true;
}
//检测文件路径
public function UpPath()
{
$mtime = date('Y-m-d');
$this->filepath = $this->filepath . '/' . $mtime;
if (!file_exists($this->filepath)) {
mkdir($this->filepath, 0777, true);
}
}
//检测文件大小
public function UpSize()
{
$max = $this->fileinfo['size'];
if ($max > $this->filemax) {
$this->fileerror = "文件过大";
return false;
}
return true;
}
//检测文件是否HTTP
public function UpPost()
{
if (!is_uploaded_file($this->fileinfo['tmp_name'])) {
$this->fileerror = "恶意上偿还";
return false;
}
return true;
}
//文件名防止重复
public function Upname()
{
return md5(uniqid(microtime(true), true));
}
//图片缩略图
public function Smallimg($x = 300, $y = 300)
{
$imgAtt = getimagesize($this->path);
//图像宽，高，类型
$imgWidth = $imgAtt[0];
$imgHeight = $imgAtt[1];
$imgext = $imgAtt[2];
//等比列缩放
if (($x / $imgWidth) > ($y / $imgHeight)) {
$bl = $y / $imgHeight;
} else {
$bl = $x / $imgWidth;
}
$x = floor($imgWidth * $bl); //缩放后
$y = floor($imgHeight * $bl);
$images = imagecreatetruecolor($x, $y);
switch ($imgext) {
case 1:
$imageout = imagecreatefromgif($this->path);
break;
case 2:
$imageout = imagecreatefromjpeg($this->path);
break;
case 3:
$imageout = imagecreatefrompng($this->path);
break;
default:
$imageout = imagecreatefromjpeg($this->path);
}
imagecopyresized($images, $imageout, 0, 0, 0, 0, $x, $y, $imgWidth, $imgHeight);
$names = $this->Upname();
$this->path = $this->filepath . '/' . $names . '.' . $this->ext;
imagejpeg($images, $this->path);
return $this->path;
}
//文件上传
public function uploads()
{
if ($this->UpError() && $this->UpMine() && $this->UpExt() && $this->UpSize() && $this->UpPost()) {
$this->UpPath();
$names = $this->Upname();
$this->path = $this->filepath . '/' . $names . '.' . $this->ext;
if (move_uploaded_file($this->fileinfo['tmp_name'], $this->path)) {
return $this->path;
} else {
$this->fileerror = "上传失败";
}
} else {
exit("<b>" . $this->fileerror . "</b>");
}
}
}
转载请注明：刘磊博客 » PHP实现图片上传并生成缩略图