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run code in 150+ php & hhvm versions
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<?php $hash = '$2y$04$usesomesillystringfore7hnbRJHxXVLeakoG8K30oukPsA.ztMG'; $test = crypt("password", $hash); $pass = $test == $hash; echo "Test for functionality of compat library: " . ($pass ? "Pass" : "Fail"); echo "\n";
Output for 5.3.7 - 7.1.0
Test for functionality of compat library: Pass
Output for 5.3.0 - 5.3.6
Test for functionality of compat library: Fail
Output for 4.3.0 - 5.2.17

Process exited with code 139.