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I have a content type that allows users to make their own tags, for me to be able to properly search through these tags I need them to be in a specific format.

Rather than burden users with my strict formatting guideline I would like to just alter the input to my format before creating the tag. Is such a thing possible?

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    Could you explain what you mean by 'format'? – ratface Nov 7 '15 at 20:43
  • the format is a single tag with all ingredients for instance, a food recipe may call for apples bacon and sugar, the format I would need is apple-bacon-sugar – Telix Nov 7 '15 at 21:10
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Implement hook_taxonomy_term_presave in a custom module and alter the terms according using PHP's string manipulation functions.

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