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run code in 200+ php & hhvm versions
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<?php echo "\u{1F4A9}"; var_dump(strlen("\u{1F4A9}"));
based on MV9uG
Output for 7.0.0 - 7.2.0
💩int(4)
Output for 4.3.0 - 5.6.28
\u{1F4A9}int(9)