array_intersect_ukey

例

例1

2つの配列のキー名（ユーザー定義関数を使用してキー名を比較する）を比較し、交差点を返します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">機能</span><span class="token function-definition function">myfunction</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token punctuation">、</span> <span class="token variable">$ b</span> <span class="token punctuation">）</span>
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token operator">===</span> <span class="token variable">$ b</span> <span class="token punctuation">）</span>
  <span class="token punctuation">{</span>
  <span class="token number">0</span><span class="token keyword">を返します</span><span class="token punctuation">。</span>
  <span class="token punctuation">}</span>
  <span class="token keyword">return</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token operator">></span> <span class="token variable">$ b</span> <span class="token punctuation">）</span> <span class="token operator">？</span> <span class="token number">1</span> <span class="token punctuation">：</span> <span class="token operator">-1</span> <span class="token punctuation">;</span><span class="token number">​</span>
<span class="token punctuation">}</span>

<span class="token variable">$ a1</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"緑"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token variable">$ a2</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"black"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"e"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>

<span class="token variable">$ result</span> <span class="token operator">=</span><span class="token function"></span></span><mark> <span class="token function">array_intersect_ukey</span> <span class="token punctuation">（</span> <span class="token variable">$ a1</span> <span class="token punctuation">、</span> <span class="token variable">$ a2</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">）</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span> <span class="token variable">$ result</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください

例2

3つの配列（ユーザー定義関数を使用してキー名を比較する）のキー名を比較し、交差点を返します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">機能</span><span class="token function-definition function">myfunction</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token punctuation">、</span> <span class="token variable">$ b</span> <span class="token punctuation">）</span>
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token operator">===</span> <span class="token variable">$ b</span> <span class="token punctuation">）</span>
  <span class="token punctuation">{</span>
  <span class="token number">0</span><span class="token keyword">を返します</span><span class="token punctuation">。</span>
  <span class="token punctuation">}</span>
  <span class="token keyword">return</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token operator">></span> <span class="token variable">$ b</span> <span class="token punctuation">）</span> <span class="token operator">？</span> <span class="token number">1</span> <span class="token punctuation">：</span> <span class="token operator">-1</span> <span class="token punctuation">;</span><span class="token number">​</span>
<span class="token punctuation">}</span>

<span class="token variable">$ a1</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"緑"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token variable">$ a2</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"black"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"d"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token variable">$ a3</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"e"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"purple"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"f"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"white"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">" gold "</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>

<span class="token variable">$ result</span> <span class="token operator">=</span><span class="token function"></span></span><mark> <span class="token function">array_intersect_ukey</span> <span class="token punctuation">（</span> <span class="token variable">$ a1</span> <span class="token punctuation">、</span> <span class="token variable">$ a2</span> <span class="token punctuation">、</span> <span class="token variable">$ a3</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">）</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span> <span class="token variable">$ result</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください