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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_export(filter_var("0", FILTER_VALIDATE_INT)); echo "\n"; var_export(filter_var("+0", FILTER_VALIDATE_INT)); echo "\n"; var_export(filter_var("-0", FILTER_VALIDATE_INT));
Output for 5.4.11 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
0 0 0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.0 - 5.4.10
0 false false
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function filter_var() in /in/IjrFv on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: filter_var() in /in/IjrFv on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: filter_var() in /in/IjrFv on line 3
Process exited with code 255.
Output for 4.3.1
Fatal error: Call to undefined function: filter_var() in /in/IjrFv on line 3
Output for 4.3.0
Fatal error: Call to undefined function: filter_var() in /in/plc4A on line 3