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ASP, CGI and PHP Scripts and Record-Locking: What Every Webmaster Needs To Know
By: Sunil J. Tanna
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    Table of Contents:
  • ASP, CGI and PHP Scripts and Record-Locking: What Every Webmaster Needs To Know
  • Top site scripts...
  • There are a...
  • They can store...
  • Of course...
  • Now, let's summarize...
  • This article is...

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    ASP, CGI and PHP Scripts and Record-Locking: What Every Webmaster Needs To Know - They can store...

    (Page 4 of 7 )

    1. They can store each bit of data in a separate file. This isn't
    necessarily a total solution by itself (in particular, a script
    which just does this could still have problems if multiple copies
    of a script update the same file at the same time), but it does
    make data corruption less likely, and if corruption does occur,
    at least it won't corrupt the entire data store in one go.

    2. They can use file-locking. This means that if one copy of a
    script is working with a file, another copy of the script is
    prevented from working on that file, until the first copy has
    finished. File-locking works if done correctly, but programming
    it into a script needs to be done very carefully and precisely,
    for every single possible case... even a tiny bug or omission can
    allow the possibility of data-corruption in through the backdoor!

    3. They can use a database (such as MySQL) to store the data.
    Provided the data is properly structured in the database, the
    database handles the locking automatically. And, as the
    programmer doesn't have to write their own special locking
    routines, the possibility of bugs and omissions are much reduced.


    Of course, avoiding having your data corrupted should be the
    paramount consideration in choosing a script, but is there
    anything else we need to be concerned about?

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