1.编程: 文件上传与检测:
实例
<form action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']) ?>" method="post" enctype="multipart/form-data"> <input type="hidden" name="MAX_FILE_SIZE" value="542488"> <fieldset> <legend>文件上传</legend> <input type="file" name="upload"> </fieldset> <p align="center"> <button type="submit">上传</button> </p> </form> <?php if ($_SERVER['REQUEST_METHOD'] == 'POST') { //检测是否是上传功能 if (isset($_FILES['upload'])) { $allow = ['image/jpg', 'image/jpeg', 'image/png']; if (in_array($_FILES['upload']['type'], $allow)) { $tempFile = $_FILES['upload']['tmp_name']; $destFile = $_FILES['upload']['name']; if (move_uploaded_file($tempFile, "upload/$destFile")) { echo '<script> alert("上传成功")</script>'; } else { echo '<script> alert("文件上传格式不对")</script>'; } } //上传错误进行判断 $err = $_FILES['upload']['error']; if ($err > 0) { echo '<p>错误原因是:<strong>'; switch ($err) { case 1: $str = '文件超过php.ini中设置的大小'; break; case 2: $str = '文件超过表单常量设置的大小'; break; case 3: $str = '仅有部分上传'; break; case 4: $str = '没有文件上传'; break; default: $str = '未知错误'; } echo $str; } } } else { exit('请求类型错误'); } ?>
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2.编程: 目录遍历:
实例
<?php //遍历目录方法1 $dir = opendir('../0824') or die('打开失败'); while(false != ($file = readdir($dir))){ if ($file != ".." && $file != "."){ print nl2br($file."\n"); } } echo '<hr>'; //遍历目录方法2 $fileArr = scandir('../0829'); foreach ($fileArr as $file) { if ($file != ".." && $file != "."){ print nl2br($file."\n"); } } ?>
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