Description:
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---
From manual page: https://php.net/splfileobject.fwrite
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Documentation states method returns 0 on error, returns false instead.

using production ini with ext: mbstring and ext:openssl enabled

Test script:
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<?php
$file = new SplFileObject(__FILE__);
$exitCode = $file->fwrite('Hallo');
var_dump($exitCode);

Expected result:
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int(0)

Actual result:
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bool(false)