compact

实例

例子 1

创建一个包含变量名和它们的值的数组：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$firstname</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Bill"</span><span class="token punctuation">;</span>
<span class="token variable">$lastname</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Gates"</span><span class="token punctuation">;</span>
<span class="token variable">$age</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"60"</span><span class="token punctuation">;</span>

<span class="token variable">$result</span> <span class="token operator">=</span> <span class="token function"></span><mark><span class="token function">compact</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"firstname"</span><span class="token punctuation">,</span> <span class="token string double-quoted-string">"lastname"</span><span class="token punctuation">,</span> <span class="token string double-quoted-string">"age"</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></span>

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例子 2

使用不匹配变量的字符串，以及一个变量名数组：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$firstname</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Bill"</span><span class="token punctuation">;</span>
<span class="token variable">$lastname</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Gates"</span><span class="token punctuation">;</span>
<span class="token variable">$age</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"60"</span><span class="token punctuation">;</span>

<span class="token variable">$name</span> <span class="token operator">=</span> <span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"firstname"</span><span class="token punctuation">,</span> <span class="token string double-quoted-string">"lastname"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token variable">$result</span> <span class="token operator">=</span> <span class="token function"></span><mark><span class="token function">compact</span><span class="token punctuation">(</span><span class="token variable">$name</span><span class="token punctuation">,</span> <span class="token string double-quoted-string">"location"</span><span class="token punctuation">,</span> <span class="token string double-quoted-string">"age"</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></span>

亲自试一试