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  <author_name>iww</author_name>
  <author_url>https://blog.hatena.ne.jp/iww/</author_url>
  <blog_title>揮発性のメモ２</blog_title>
  <blog_url>https://iww.hateblo.jp/</blog_url>
  <categories>
    <anon>PHP</anon>
  </categories>
  <description>PHP8.1で既存のプログラムを動かすと、Deprecated（非推奨）のエラーがやたら出る。 &lt;?php $a = ucfirst(null); var_dump($a); Deprecated: ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in /home/user/scripts/code.php on line 2 string(0) &quot;&quot; 今までは nullable だったのに、なんか急にダメ扱いにしたのが原因。 www.php.netまた、PHP8.0から error_…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2023-10-01 08:59:32</published>
  <title> PHP8.1で &quot;Deprecated: ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated in&quot;</title>
  <type>rich</type>
  <url>https://iww.hateblo.jp/entry/20231001/Deprecated</url>
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