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<?php $content = "<?"; $tokensOldContentLength = 0; $possibleOpenContent = substr($content, -1, 5); var_dump($possibleOpenContent); var_dump(substr('a', 0, 2));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "?" string(1) "a"

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122.09 ms | 402 KiB | 121 Q