How to solve the problem of Chinese garbled code of substr_replace () method in PHP?

$str = "Test this method await;
$res = substr_replace ($str," can", 0Power2);
echo $res;
/ / the desired result is: you can use this method a;
/ / but there is garbled
how to solve this problem

Feb.07,2022

PHP document

there is an implementation of mb_substr_replace
mb_substr_replace by billg@microsoft.com

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3799b-2c0ae.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3799b-2c0ae.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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