分享PHP获取FLV文件的时间（get_flv_file_time）示例代码

PHP如何获取FLV文件时间呢,答案是fopen文件后查看FLV文件是HEX数据,并转换为number。

 <?php
 function BigEndian2Int($byte_word,$signed=false)
 {
     $int_value    =0;
     $byte_wordlen=strlen($byte_word);
     for($i=0;$i<$byte_wordlen;$i++){
         $int_value+=ord($byte_word{$i})*pow(256,($byte_wordlen-1-$i));
     }
     if($signed){
         $sign_mask_bit=0x80<<(8*($byte_wordlen-1));
         if($int_value&$sign_mask_bit){
             $int_value=0-($int_value&($sign_mask_bit-1));
         }
     }
     return$int_value;
 }
  
 function getTime($name)
 {
     if(!file_exists($name)){
         return;
     }
     $flv_data_length=filesize($name);
     $fp              =@fopen($name,'rb');
     $flv_header      =fread($fp,5);
     fseek($fp,5,SEEK_SET);
     $frame_size_data_length  =BigEndian2Int(fread($fp,4));
     $flv_header_frame_length=9;
     if($frame_size_data_length>$flv_header_frame_length){
         fseek($fp,$frame_size_data_length-$flv_header_frame_length,SEEK_CUR);
     }
     $duration=0;
     while((ftell($fp)+1)<$flv_data_length){
         $this_tag_header=fread($fp,16);
         $data_length     =BigEndian2Int(substr($this_tag_header,5,3));
         $timestamp       =BigEndian2Int(substr($this_tag_header,8,3));
         $next_offset     =ftell($fp)-1+$data_length;
         if($timestamp>$duration){
             $duration=$timestamp;
         }
         fseek($fp,$next_offset,SEEK_SET);
     }
     fclose($fp);
     return$duration;
 }
  
 function get_flv_file_time($time)
 {
 $time=getTime($time);
     $num=$time;
     $sec=intval($num/1000);
     $h   =intval($sec/3600);
     $m   =intval(($sec%3600)/60);
     $s   =intval(($sec%60));
     $tm  =$h.':'.$m.':'.$s;
     return$tm;
 }
  
 ?>

直接使用get_flv_file_time(“你的FLV.flv”)即可。