<li id="show_code">

<h3>代码</h3>

<pre>

<code class="line-numbers language-php">function isImage($filename){

$types = '.jpeg|.png|.gif';

if(file_exists($filename)){

$info = getimagesize($filename);

$ext = image_type_to_extension($info[2]);

if(stripos($types,$ext)>=0){

return $ext;

}else{

return false;

}

}else{

return false;

}

}

$is_upload = false;

$msg = null;

if(isset($_POST['submit'])){

$temp_file = $_FILES['upload_file']['tmp_name'];

$res = isImage($temp_file);

if(!$res){

$msg = "文件未知，上传失败！";

}else{

$img_path = UPLOAD_PATH."/".rand(10, 99).date("YmdHis").$res;

if(move_uploaded_file($temp_file,$img_path)){

$is_upload = true;

} else {

$msg = "上传出错！";

}

}

}

</code>

</pre>

</li>