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<?php $tests = array( "42", "1337", "0x539", "02471", "0b10100111001", "1337e0", "not numeric", array(), "9.1", ); foreach ($tests as $element) { if (is_numeric($element)) { echo "'{$element}' is numeric:", var_dump((float) $element); } else { echo "'{$element}' is NOT numeric", PHP_EOL; } }
Output for 7.0.0 - 7.1.0
'42' is numeric:float(42) '1337' is numeric:float(1337) '0x539' is NOT numeric '02471' is numeric:float(2471) '0b10100111001' is NOT numeric '1337e0' is numeric:float(1337) 'not numeric' is NOT numeric Notice: Array to string conversion in /in/hl25F on line 18 'Array' is NOT numeric '9.1' is numeric:float(9.1)
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0
'42' is numeric:float(42) '1337' is numeric:float(1337) '0x539' is numeric:float(0) '02471' is numeric:float(2471) '0b10100111001' is NOT numeric '1337e0' is numeric:float(1337) 'not numeric' is NOT numeric Notice: Array to string conversion in /in/hl25F on line 18 'Array' is NOT numeric '9.1' is numeric:float(9.1)
Output for 4.3.10 - 4.4.9, 5.0.3 - 5.3.29
'42' is numeric:float(42) '1337' is numeric:float(1337) '0x539' is numeric:float(0) '02471' is numeric:float(2471) '0b10100111001' is NOT numeric '1337e0' is numeric:float(1337) 'not numeric' is NOT numeric 'Array' is NOT numeric '9.1' is numeric:float(9.1)
Output for 5.0.2
'42' is numeric:float(42) '1337' is numeric:float(1337) '0x539' is numeric:float(1337) '02471' is numeric:float(2471) '0b10100111001' is NOT numeric '1337e0' is numeric:float(1337) 'not numeric' is NOT numeric 'Array' is NOT numeric '9.1' is numeric:float(9.1)
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
'42' is numeric:float(42) '1337' is numeric:float(1337) '0x539' is numeric:float(1337) '02471' is numeric:float(2471) '0b10100111001' is NOT numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hl25F on line 18 PHP_EOL'1337e0' is numeric:float(1337) 'not numeric' is NOT numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hl25F on line 18 PHP_EOL'Array' is NOT numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hl25F on line 18 PHP_EOL'9.1' is numeric:float(9.1)