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Top Forums UNIX for Beginners Questions & Answers How do you preserve the max length of a line after replacing a specific value? Post 303041382 by RudiC on Friday 22nd of November 2019 03:23:23 AM
Old 11-22-2019
Try (assuming you want to fill up with spaces)

Code:
$ SPC="          "
$ sed  "s/ID3/$NEW${SPC:${#NEW}}/g" file

 

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ID3_SET_TAG(3)								 1							    ID3_SET_TAG(3)

id3_set_tag - Update information stored in an ID3 tag

SYNOPSIS
bool id3_set_tag (string $filename, array $tag, [int $version = ID3_V1_0]) DESCRIPTION
id3_set_tag(3) is used to change the information stored of an ID3 tag. If no tag has been present, it will be added to the file. PARAMETERS
o $filename - The path to the MP3 file Instead of a filename you may also pass a valid stream resource o $tag - An associative array of tag keys and values The following keys may be used in the associative array: Keys in the associative array +--------+--------------------------------------+---+ | key | | | | | | | | | possible value | | | | | | | | available in version | | | | | | +--------+--------------------------------------+---+ | title | | | | | | | | | string with maximum of 30 characters | | | | | | | | v1.0, v1.1 | | | | | | |artist | | | | | | | | | string with maximum of 30 characters | | | | | | | | v1.0, v1.1 | | | | | | | album | | | | | | | | | string with maximum of 30 characters | | | | | | | | v1.0, v1.1 | | | | | | | year | | | | | | | | | 4 digits | | | | | | | | v1.0, v1.1 | | | | | | | genre | | | | | | | | | integer value between 0 and 147 | | | | | | | | v1.0, v1.1 | | | | | | |comment | | | | | | | | | string with maximum of 30 characters | | | | (28 in v1.1) | | | | | | | | v1.0, v1.1 | | | | | | | track | | | | | | | | | integer between 0 and 255 | | | | | | | | v1.1 | | | | | | +--------+--------------------------------------+---+ o $version - Allows you to specify the version of the tag as MP3 files may contain both, version 1.x and version 2.x tags RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 id3_set_tag(3) example <?php $data = array( "title" => "Re:Start", "artist" => "Re:Legion", "comment" => "A nice track" ); $result = id3_set_tag( "path/to/example.mp3", $data, ID3_V1_0 ); if ($result === true) { echo "Tag successfully updated "; } ?> If the file is writable, this will output: Tag successfully updated NOTES
Note Currently id3_set_tag(3) only supports version 1.0 and 1.1. SEE ALSO
id3_remove_tag(3), id3_get_tag(3), id3_get_version(3). PHP Documentation Group ID3_SET_TAG(3)
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