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run code in 300+ PHP versions simultaneously
<?php $tokens = token_get_all('<?php echo "hello\{$foo}"; ?>'); foreach ($tokens as $token) { if (is_array($token)) { echo "Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL; } }

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27.79 ms | 402 KiB | 5 Q