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PHP - Extract numbers from a string

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I want to extract the numbers from a string that contains numbers and letters like

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Copy this code and paste it in your HTML 
  1. $str = 'In My Cart : 11 12 items';
  2. preg_match_all('!\d+!', $str, $matches);
  3. print_r($matches);

URL: http://stackoverflow.com/questions/6278296/extract-numbers-from-a-string

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