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  <author_name>devillikeaangel</author_name>
  <author_url>https://blog.hatena.ne.jp/devillikeaangel/</author_url>
  <blog_title>kikukawa's diary</blog_title>
  <blog_url>https://kkkw.hatenablog.jp/</blog_url>
  <categories>
    <anon>PHP</anon>
  </categories>
  <description>思いついたのでメモ書き トリッキー過ぎて現場では使えない。 &lt;?php function is_even($var){ return(!($var &amp; 1)); } function array_filter_keys($var,$callback){ $var = array_flip($var); $var = array_filter($var,$callback); return array_flip($var); } $arr = array( 1=&gt;'aaa', 2=&gt;'bbb', 3=&gt;'ccc', 4=&gt;'ddd', 5=&gt;'eee', ); var_export(array_…</description>
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  <image_url></image_url>
  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2012-05-02 22:06:27</published>
  <title>配列のキーでfilter</title>
  <type>rich</type>
  <url>https://kkkw.hatenablog.jp/entry/20120502/1335963987</url>
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