PHP implementation to obtain FLV file time_php tutorial

PHP implementation to obtain the FLV File time. PHP implementation of FLV file acquisition time this article mainly introduces the PHP implementation of FLV file acquisition time, this article directly provides the implementation code and use method, for more information about how to obtain FLV files in PHP, see

This article mainly introduces how to obtain the FLV file in PHP. This article provides the implementation code and how to use it. For more information, see

How does PHP obtain the FLV file Time? the answer is that the FLV file is HEX data after the fopen file is viewed and converted to number.

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 = ftell ($ fp)-1 + $ data_length;
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;
}

?>

Use get_flv_file_time ("your FLV. flv") directly.

This article describes how to obtain the FLV file in PHP. This article provides the implementation code and how to use it. For more information, see how to obtain the FLV file in PHP...