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@ 2018-05-23T04:58:05Z

<?php

$str = "";
$str[0] = 1 << 7;

var_dump($str);

$str2 = "" . (1 << 7);

var_dump($str2);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

39.28 ms | 402 KiB | 5 Q