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Testing for HTML Text Using Regular Expression

/ Published in: JavaScript
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Use this to validate if input has html elements

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  1. //Testing for html in input box value
  2. //e.g. '<script>' will validate true and be unsafe for processing
  3.  
  4. alert(/^(?:[^<]*(<[\w\W]+>)[^>]*$|#([\w\-]+)$)/.test($j('#sometxt').val()) ? 'unsafe' : 'safe');
  5.  
  6.  
  7. <input type="text" id="sometxt" \>
  8.  
  9. //For PHP. Will validate to true and unsafe
  10.  
  11. $val = '<script>do.bad();</script>';
  12.  
  13. $patt = "/^(?:[^<]*(<[\w\W]+>)[^>]*$|#([\w\-]+)$)/";
  14.  
  15. echo preg_match($patt,$val) ? 'unsafe' : 'safe';

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