array_walk
ユーザー定義の関数を使用して、配列内の各要素にコールバックを作成します
日本語
日本語
配列内の各要素にユーザー定義の関数を適用します。
<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">$ value</span> <span class="token punctuation">、</span> <span class="token variable">$ key</span> <span class="token punctuation">）</span>
<span class="token punctuation">{</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"キー<span class="token interpolation"><span class="token variable">$キー</span></span>には値<span class="token interpolation"><span class="token variable">$ value</span></span> <br>"があります</span><span class="token punctuation">。</span>
<span class="token punctuation">}</span>
<span class="token variable">$ a</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">"green"</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 function"></span></span><mark><span class="token function">array_walk</span> <span class="token punctuation">（</span> <span class="token variable">$ a</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 delimiter important">？></span>
パラメーターを設定します：
<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">$ value</span> <span class="token punctuation">、</span> <span class="token variable">$ key</span> <span class="token punctuation">、</span> <span class="token variable">$ p</span> <span class="token punctuation">）</span>
<span class="token punctuation">{</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">" <span class="token interpolation"><span class="token variable">$ key</span></span> <span class="token interpolation"><span class="token variable">$ p</span></span> <span class="token interpolation"><span class="token variable">$ value</span></span> <br>"</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$ a</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">"green"</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 function"></span></span><mark><span class="token function">array_walk</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"has value"</span> <span class="token punctuation">））</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>
配列要素の値を変更します（注＆$値）：
<span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">機能</span><span class="token function-definition function">myfunction</span> <span class="token punctuation">（</span> <span class="token operator">＆</span> <span class="token variable">$ value</span> <span class="token punctuation">、</span> <span class="token variable">$ key</span> <span class="token punctuation">）</span>
<span class="token punctuation">{</span>
<span class="token variable">$ value</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Yellow"</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$ a</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">"green"</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 function"></span></span><mark><span class="token function">array_walk</span> <span class="token punctuation">（</span> <span class="token variable">$ a</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">$ a</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>
array_key_exists
array_diff_uassoc
sizeof
array_multisort
array_uintersect_assoc
usort
array_replace
array_combine
