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PHP - Remove all non-numeric characters

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Sometimes it’s helpful to ONLY get numeric characters.
Phone numbers, age — whatever your little PHP heart desires.

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Copy this code and paste it in your HTML 
  1. $strNumeric = preg_replace('/\D/', '', $strNonNumeric);

URL: http://www.crainbandy.com/programming/function-to-remove-all-non-numeric-characters-in-php

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