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run code in 300+ PHP versions simultaneously
<?php if (version_compare(PHP_VERSION, '7.0.0', '<')) { define('BASIC_TYPE_HINT_REGEX', '#^Argument \d+ passed to .+? must be an instance of ([a-z]+), ([a-z]+) given#i'); function basic_type_hint($err_lvl, $err_msg) { if ($err_lvl == E_RECOVERABLE_ERROR) { if (preg_match(BASIC_TYPE_HINT_REGEX, $err_msg, $matches)) { if ($matches[1] == $matches[2]) { return true; } switch ($matches[1]) { case 'int': return $matches[2] == 'integer'; case 'bool': return $matches[2] == 'boolean'; default: return false; } } } return false; } set_error_handler('basic_type_hint'); } function foo(int $a) { print $a; } foo(42); foo(23);

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