php实现当前页面点击下载文件实例

public function downFile($path = ''){
if(!$path) header("Location: /");
download($path);
}

function download($file_url,$new_name=''){
if(!isset($file_url)||trim($file_url)==''){
echo '500';
}
if(!file_exists($file_url)){ //检查文件是否存在
echo '404';
}
$file_name=basename($file_url);
$file_type=explode('.',$file_url);
$file_type=$file_type[count($file_type)-1];
$file_name=trim($new_name=='')?$file_name:urlencode($new_name);
$file_type=fopen($file_url,'r'); //打开文件
//输入文件标签
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: ".filesize($file_url));
header("Content-Disposition: attachment; filename=".$file_name);
//输出文件内容
echo fread($file_type,filesize($file_url));
fclose($file_type);
}

<iframe id="iframe" src="" style="display: none;"></iframe>
$(function(){
$('.downLoad').click(function(){
var path = $(this).attr('path');
$('#iframe').attr('src',"php文件路径?path="+path);
})
})