PHP basics four - file upload
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<!-- 文件上传 -->
<form action="" enctype="multipart/form-data" method="post">
<input type="file" name="文件"/><br />
<input type="submit" value="上传"/>
</form>
<?php
//文件上传之需要注意php.ini文件
// php.ini文件中的配置
// file_uploads
// post_max_size
// upload_max_filesize
// memory_limit
// print_r($_FILES["upfile"]);
if (is_uploaded_file($_FILES['upfile']['tmp_name'])) {
$upfile=$_FILES["upfile"];
$name=$upfile["name"];
$type=$upfile["type"];
$size=$upfile["size"];
$tmp_name=$upfile["tmp_name"];
switch ($type) {
case 'image/pjpeg':
$okType=true;
break;
case 'image/jpeg':
$okType=true;
break;
case 'image/gif':
$okType=true;
break;
case 'image/png':
$okType=true;
break;
}
if ($okType) {
$error=$upfile["error"];
echo "==================<br/>";
echo "上传的文件名称是：".$name."<br/>";
echo "上传的文件类型是：".$type."<br/>";
echo "上传的文件大小是：".$size."<br/>";
echo "上传之后系统返回的值是：".$error."<br/>";
echo "上传的文件临时存放的文件路径是：".$tmp_name."<br/>";
echo "开始移动上传文件<br/>";
move_uploaded_file($tmp_name, 'up/'.$name);
$destination="up/".$name;
echo "================<br/>";
echo "上传信息：<br/>";
if ($error==0) {
echo "文件上传成功！";
echo "<br>图片预览<br>";
echo "<img src=".$destination.">";
}elseif ($error==1){
echo "超过了文件大小，在php.ini文件中设置";
}elseif ($error==2){
echo "超过文件的大小MAX_FILE_SIZE选项指定的值";
}elseif ($error==3){
echo "文件只有部分被上传";
}elseif ($error==4){
echo "上传文件大小为0";
}
}else {
echo "请上传jpg,gif,png等格式的图片";
}
}
?>
<!-- 文件上传的步骤 -->
<?php
// 一、判断是否有错误码
// 二、自定义判断是否超出文件大小范围
// 三、判断后缀名和mime类型是否符合
// 四、生成文件名
// 五、判断是否是上传文件
// 六、移动临时文件到指定位置
?>
<!-- 文件上传表单注意事项 -->
<html>
<head>
<meta charset="utf-8"/>
<title>单文件上传</title>
</head>
<body>
<form action="file.php" method="post"
enctype="multipart/form-data">
<input type="file" name="filename"/>
<input type="submit" value="上传"/>
</form>
</body>
</html>
<!-- 按照数组和步骤完成文件上传 -->
<!-- 第一步，判断错误码 -->
<!-- 第二步，判断文件是否超出大小 -->
<!-- 第三步，判断文件的mime类型是否正确 -->
<!-- 第四步，生成指定的路径和文件名 -->
<!-- 第五步，判断是否是上传文件 -->
<!-- 第六步，移动文件到指定位置 -->
<form action='' method='post' enctype='multipart/form-data'>
<input type='file' name='myfile' />
<input type="submit" />
</form>
<?php
echo '<pre class="brush:php;toolbar:false">';
var_dump($_FILES['myfile']);
echo '';
if ($_FILES['myfile']['error'] > 0) {
switch ($_FILES['myfile']['error']) {
case '1':
echo '文件过大';
break;
case '2':
echo '文件超出指定大小';
break;
case '3':
echo '只有部分文件被上传';
break;
case '4':
echo '文件没有被上传';
break;
case '6':
echo '找不到指定文件';
break;
case '7':
echo '文件写入失败';
break;
default:
echo '上传出错'; } }else{ $MAX_FILE_SIZE = 100000; if ($_FILES['myfile']['size'] > $MAX_FILE_SIZE) { exit("文件超出指定大小"); } $allowSuffix = array('jpg','gif'); $myImg = explode('.', $_FILES['myfile']['name']); $myImgSuffix = array_pop($myImg); if (!in_array($myImgSuffix, $allowSuffix)) { exit("文件后缀名不符"); } $allowMime = array( "image/jpg", "image/jpeg", "image/pjpeg", "image/gif" ); if (!in_array($_FILES['myfile']['type'], $allowMime)) { exit('文件格式不正确，请检查'); } $path = "upload/images/"; $name = data('Y').date('m').date("d") .date('H').date('i').date('s'). rand(0,9).'.'.$myImgSuffix; if (is_uploaded_file($_FILES['file']['tmp_name'])) { if (move_uploaded_file($_FILES['myfile']['tmp_name'], $path.$name)) { echo "上传成功"; }else { echo '上传失败'; } } } ?>
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