3v4l.org

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<?php $i = rtrim(base64_encode(rtrim(pack('E', 1.2), "\x00")), '='); var_dump($i); var_dump(unpack('E', str_pad(base64_decode($i), 8, "\x00")));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
string(11) "P/MzMzMzMzM" array(1) { [1]=> float(1.2) }

preferences:
88.23 ms | 1151 KiB | 4 Q