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block file

Posted on 2003-10-27
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Last Modified: 2006-11-17
Hello

I need block a file while the user edit.

any ideas?

Thanks

Mario
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Question by:Mario_castro
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rstorey2079 earned 50 total points
ID: 9629176
Try using flock() function.  There is an example here: http://us2.php.net/manual/en/function.flock.php
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by:Mario_castro
ID: 9629713
and when verify that the file is lock?
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Expert Comment

by:rstorey2079
ID: 9629761
After PHP opens the file using fopen, you can verify that you are the only one using it by calling flock().  If flock() returns false, that means that you could not obtain a lock on the file.

Here's the example:

<?php

$fp = fopen("/tmp/lock.txt", "w+");

if (flock($fp, LOCK_EX)) { // do an exclusive lock
    fwrite($fp, "Write something here\n");
    flock($fp, LOCK_UN); // release the lock
} else {
    echo "Couldn't lock the file !";
}

fclose($fp);

?>

Hope that answers your question.
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