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Top Forums Shell Programming and Scripting script to splite large file to number of small files Post 302214422 by ahmed.gad on Monday 14th of July 2008 03:47:20 AM
Old 07-14-2008
script to splite large file to number of small files

Dear All,
Could you please help me to split a file contain around 240,000,000 line to 4 files all equally likely , note that we need to maintain that the end of each file should started by start flage (MSISDN) and ended by end flag (End), also the number of the line between the start flag (MSISDN) and end flag (End) are variable.
Kindly find below sample of the lines in the file
//////////////////////////////////////////////////////
MSISDN
line1
line2
line3
line4
line5
.
.
Line36
End
MSISDN
line1
line2
line3
line4
line5
.
.
line37
End
MSISDN
.
.
//////////////////////////////////////////

Thank you in advance,
 

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STREAM_WRAPPER_REGISTER(3)						 1						STREAM_WRAPPER_REGISTER(3)

stream_wrapper_register - Register a URL wrapper implemented as a PHP class

SYNOPSIS
bool stream_wrapper_register (string $protocol, string $classname, [int $flags]) DESCRIPTION
Allows you to implement your own protocol handlers and streams for use with all the other filesystem functions (such as fopen(3), fread(3) etc.). PARAMETERS
o $protocol - The wrapper name to be registered. o $classname - The classname which implements the $protocol. o $flags - Should be set to STREAM_IS_URL if $protocol is a URL protocol. Default is 0, local stream. RETURN VALUES
Returns TRUE on success or FALSE on failure. stream_wrapper_register(3) will return FALSE if the $protocol already has a handler. CHANGELOG
+--------+------------------------------+ |Version | | | | | | | Description | | | | +--------+------------------------------+ | 5.2.4 | | | | | | | Added the $flags parameter. | | | | +--------+------------------------------+ EXAMPLES
Example #1 How to register a stream wrapper <?php $existed = in_array("var", stream_get_wrappers()); if ($existed) { stream_wrapper_unregister("var"); } stream_wrapper_register("var", "VariableStream"); $myvar = ""; $fp = fopen("var://myvar", "r+"); fwrite($fp, "line1 "); fwrite($fp, "line2 "); fwrite($fp, "line3 "); rewind($fp); while (!feof($fp)) { echo fgets($fp); } fclose($fp); var_dump($myvar); if ($existed) { stream_wrapper_restore("var"); } ?> The above example will output: line1 line2 line3 string(18) "line1 line2 line3 " SEE ALSO
The "streamWrapper" prototype class, "Example class registered as stream wrapper", stream_wrapper_unregister(3), stream_wrapper_restore(3), stream_get_wrappers(3). PHP Documentation Group STREAM_WRAPPER_REGISTER(3)
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