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What are the differences between ['value'] and ['safe_value']?

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It is a value, passed through the function _text_sanitize(). You can read more in the official docs.

If you are using 'safe_value', you may be also interested in this article: Rendering Drupal 7 fields (the right way).

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The main difference it that the safe_value is passed through the function _text_sanitize().

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    At the same time :)
    – kalabro
    Commented Aug 31, 2011 at 12:14
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    Depending on the type of value you want in safe_value, you can forego the use of _text_sanitize() and use check_plain($text) for plain text or check_markup($text, $format) for HTML
    – Agi Hammerthief
    Commented Nov 20, 2014 at 12:21
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For Readers benefit, DO NOT use safe_value data when making SQL statements. In other words, strings containing ampersand ( & ) will become ( & ) fail to get the expected results.

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