'42' is numeric
1337 is numeric
1337 is numeric
'0x539' is NOT numeric
1337 is numeric
'02471' is numeric
2479 is numeric
2471 is numeric
1337 is numeric
'0b10100111001' is NOT numeric
1337.0 is numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.1 is numeric

Output for 7.0.2 - 7.1.0RC1

'42' is numeric
1337 is numeric
1337 is numeric
'0x539' is NOT numeric
1337 is numeric
'02471' is numeric
2479 is numeric
2471 is numeric
1337 is numeric
'0b10100111001' is NOT numeric
1337.0 is numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.09999999999999964472863 is numeric

Output for 7.0.0 - 7.0.1

'42' is numeric
1337 is numeric
1337 is numeric
'0x539' is NOT numeric
1337 is numeric
'02471' is numeric
2479 is numeric
2471 is numeric
1337 is numeric
'0b10100111001' is NOT numeric
1337 is numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.09999999999999964472863 is numeric

Output for hhvm-3.10.0 - 3.12.0

'42' is numeric
1337 is numeric
1337 is numeric
'0x539' is NOT numeric
1337 is numeric
'02471' is numeric
2479 is numeric
2471 is numeric
1337 is numeric
'0b10100111001' is NOT numeric
1337 is numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.1 is numeric

Output for 5.4.22 - 5.4.45, 5.5.6 - 5.6.25

'42' is numeric
1337 is numeric
1337 is numeric
'0x539' is numeric
1337 is numeric
'02471' is numeric
2479 is numeric
2471 is numeric
1337 is numeric
'0b10100111001' is NOT numeric
1337 is numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.09999999999999964472863 is numeric

Output for 5.4.0 - 5.4.21, 5.5.0 - 5.5.5

'42' is numeric
1337 is numeric
1337 is numeric
'0x539' is numeric
1337 is numeric
'02471' is numeric
2479 is numeric
2471 is numeric
1337 is numeric
'0b10100111001' is NOT numeric
1337 is numeric
'1337e0' is numeric
'not numeric' is NOT numeric
array (
) is NOT numeric
9.1 is numeric

Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29

Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/u9AfN on line 11
Process exited with code 255.