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run code in 150+ php & hhvm versions
Bugs & Features
<?php function parse_literal($str) { $str = (string)$str; if (((string)(int)$str) === $str) { return (int)$str; } else if (((string)(float)$str) === $str) { return (float)$str; } else if (0 === strcasecmp($str, 'true')) { return true; } else if (0 === strcasecmp($str, 'false')) { return false; } else if (0 === strcasecmp($str, 'null')) { return false; } else if (preg_match('<^"((?:[^"\\\\]|\\\\.)*)"|\'((?:[^\'\\\\]|\\\\.)*)\'$>', $str)) { return eval('return ' . $str . ';'); } } var_dump(parse_literal('12')); var_dump(parse_literal('12.34')); var_dump(parse_literal('true')); var_dump(parse_literal('false')); var_dump(parse_literal('null')); var_dump(parse_literal('"hello world"')); var_dump(parse_literal('"string with \" quote and escape sequences\r\n"'));
based on TH2kU
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(12) float(12.34) bool(true) bool(false) bool(false) string(11) "hello world" string(42) "string with " quote and escape sequences "