PHP implements getting the time of FLV file, _PHP tutorial

PHP implements the time to obtain the FLV file,

How to get the FLV file time in PHP? The answer is to fopen the file and check that the FLV file is HEX data and convert it to number.

Copy code The code is as follows:

functionBigEndian2Int($byte_word,$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;
}

functiongetTime($name)
{
If(!file_exists($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));
           $next_offset                                                                                                                                    If($timestamp>$duration){
               $duration=$timestamp;
}
            fseek($fp,$next_offset,SEEK_SET);
}
fclose($fp);
Return$duration;
}

functionget_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;
}

?>

Just use get_flv_file_time("your FLV.flv") directly.

http://www.bkjia.com/PHPjc/955973.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/955973.htmlTechArticlePHP implements getting the time of FLV file. How does PHP get the time of FLV file? The answer is to view the FLV file after fopening the file. It is HEX data and converted to number. Copy the code The code is as follows: php funct...