is_object

例

変数がオブジェクトであるかどうかを確認します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">function</span> <span class="token function-definition function">get_cars</span> <span class="token punctuation">（</span> <span class="token variable">$ obj</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 operator">！</span> <span class="token function">is_object</span> <span class="token punctuation">（</span> <span class="token variable">$ obj</span> <span class="token punctuation">）</span> <span class="token punctuation">）</span> <span class="token punctuation">{</span>
    <span class="token constant boolean">false</span><span class="token keyword">を返します</span><span class="token punctuation">。</span>
  <span class="token punctuation">}</span>
<span class="token variable">$ obj-</span> <span class="token operator">></span> <span class="token property">cars</span><span class="token keyword">を返します</span><span class="token punctuation">。</span>
<span class="token punctuation">}</span>

<span class="token variable">$ obj</span> <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">stdclass</span> <span class="token punctuation">（</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token variable">$ obj-</span> <span class="token operator">></span> <span class="token property">cars</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"volvo"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"bmw"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"audi"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>

<span class="token function">var_dump</span> <span class="token punctuation">（</span> <span class="token function">get_cars</span> <span class="token punctuation">（</span> <span class="token constant">null</span> <span class="token punctuation">）</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token function">var_dump</span> <span class="token punctuation">（</span> <span class="token function">get_cars</span> <span class="token punctuation">（</span> <span class="token variable">$ obj</span> <span class="token punctuation">）</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span></span>

自分で試してみてください