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run code in 200+ php & hhvm versions
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<?php $str = 'November 1997'; $str2 = 'November 20, 2001'; $matches; preg_match('/\d{4}/', $str,$matches); var_dump( (int) $str, intval($str), filter_var($str, FILTER_SANITIZE_NUMBER_INT), $matches );
based on W8XvQ
Output for 5.2.0 - 7.3.0alpha1
int(0) int(0) string(4) "1997" array(1) { [0]=> string(4) "1997" }
Output for 5.1.0 - 5.1.6
Fatal error: Call to undefined function filter_var() in /in/cOcCY on line 9
Process exited with code 255.
Output for 5.0.4 - 5.0.5
Notice: Undefined variable: matches in /in/cOcCY on line 4 Fatal error: Call to undefined function filter_var() in /in/cOcCY on line 9
Process exited with code 255.
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: matches in /in/cOcCY on line 4 Fatal error: Call to undefined function filter_var() in /in/cOcCY on line 9
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Notice: Undefined variable: matches in /in/cOcCY on line 4 Fatal error: Call to undefined function: filter_var() in /in/cOcCY on line 9
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Notice: Undefined variable: matches in /in/cOcCY on line 4 Fatal error: Call to undefined function: filter_var() in /in/cOcCY on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Notice: Undefined variable: matches in /in/cOcCY on line 4 Fatal error: Call to undefined function: filter_var() in /in/cOcCY on line 9