Description:
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---
From manual page: https://php.net/function.str-ireplace
---
Translation problems.
$count is return result,not set params.

Test script:
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$str = 'a';
str_ireplace('a','b',$str,$count);
print_r($count);


Expected result:
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count
如果设定了，将被赋值为已执行替换的次数。