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Full Discussion: Split large file into 24 small files on one hour basis
Top Forums UNIX for Beginners Questions & Answers Split large file into 24 small files on one hour basis Post 303036436 by Neo on Wednesday 26th of June 2019 07:09:24 AM
Old 06-26-2019
Actually, you do not even need to convert to a unix timestamp in PHP, you can use your formatted time string directly:

For example, I just tested your example data with your formatted time :

Code:
<?php
echo  date(h,"2019-05-20 09:55:39.945");

06

No need to convert to a unix timestamp.

Untested, but close:

Code:
<?php
$data = file_get_contents('mydata.txt');
foreach ($data as $entry) {
    $my_time_stuff = explode(' ', $entry);
    $formatted_time = $my_time_stuff[0] . ' ' . $my_time_stuff[1];
    $hour = date(h, $formatted_time);
    $file = 'myfilename' . $hour . '.txt';
    file_put_contents($file, $entry, FILE_APPEND | LOCK_EX);
}

Hope this PHP example helps.

If you want it to be "harder to read" and short:

Code:
<?php
$data = file_get_contents('mydata.txt');
foreach ($data as $entry) {
    $m= explode(' ', $entry);
    file_put_contents('myfilename' . date(h, $m[0] . ' ' . $m[1]) . '.txt', $entry, FILE_APPEND | LOCK_EX);
}

I prefer the long, easy to read, more-or-less self-documenting (first) version.
 

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LEARN ABOUT DEBIAN

flow-split

flow-split(1)						      General Commands Manual						     flow-split(1)

NAME

       flow-split -- Split flow files into smaller files.

SYNOPSIS

       flow-split [-gGhn]  [-b big|little]  [-C comment]  [-d debug_level]  [-N nflows]  [-o outfile_basename]	[-T nseconds]  [-z z_level]

DESCRIPTION

       The flow-split utility will split a flow file into smaller files based on the the number of flows or the ammount of time that has passed.

OPTIONS

       -b big|little
		 Byte order of output.

       -C Comment
		 Add a comment.

       -d debug_level
		 Enable debugging.

       -g	 Split on source tag.

       -G	 Split on destination tag.

       -h	 Display help.

       -n	 Use symbols for tag field in filename.

       -N nflows Split after processing nflows.

       -o outfile_basename
		 The basename of the resulting files.

       -T nsecond
		 Split after processing an interval of nseconds flows.

       -z z_level
		 Configure compression level to  z_level.  0 is disabled (no compression), 9 is highest compression.

EXAMPLES

       Create 1 minute flow files from the flow archive in /flows/krc4.  Store the results in /flows/krc4.split

	 flow-cat /flows/krc4 | flow-split -T60 -o /flows/krc4.split/1min.

BUGS

       None known.

AUTHOR

       Mark Fullmer maf@splintered.net

SEE ALSO

       flow-tools(1)

																     flow-split(1)
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