array

实例

例子 1

创建名为 $cars 的索引数组，向它赋三个元素，然后打印包含数组值的文本：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$cars</span><span class="token operator">=</span><span class="token keyword"></span><mark><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Volvo"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"BMW"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Toyota"</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"I like "</span> <span class="token operator">.</span> <span class="token variable">$cars</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token operator">.</span> <span class="token string double-quoted-string">", "</span> <span class="token operator">.</span> <span class="token variable">$cars</span><span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">.</span> <span class="token string double-quoted-string">" and "</span> <span class="token operator">.</span> <span class="token variable">$cars</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"."</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子 2

创建名为 $age 的关联数组：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$age</span><span class="token operator">=</span><span class="token keyword"></span><mark><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Bill"</span><span class="token operator">=></span><span class="token string double-quoted-string">"60"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Steve"</span><span class="token operator">=></span><span class="token string double-quoted-string">"56"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Mark"</span><span class="token operator">=></span><span class="token string double-quoted-string">"31"</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"Bill is "</span> <span class="token operator">.</span> <span class="token variable">$age</span><span class="token punctuation">[</span><span class="token string single-quoted-string">'Bill'</span><span class="token punctuation">]</span> <span class="token operator">.</span> <span class="token string double-quoted-string">" years old."</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子 3

遍历并打印索引数组的值：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$cars</span><span class="token operator">=</span><span class="token keyword"></span><mark><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Volvo"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"BMW"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Toyota"</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span>
<span class="token variable">$arrlength</span><span class="token operator">=</span><span class="token function">count</span><span class="token punctuation">(</span><span class="token variable">$cars</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">for</span><span class="token punctuation">(</span><span class="token variable">$x</span><span class="token operator">=</span><span class="token number">0</span><span class="token punctuation">;</span><span class="token variable">$x</span><span class="token operator"><</span><span class="token variable">$arrlength</span><span class="token punctuation">;</span><span class="token variable">$x</span><span class="token operator">++</span><span class="token punctuation">)</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token variable">$cars</span><span class="token punctuation">[</span><span class="token variable">$x</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 punctuation">}</span>
<span class="token delimiter important">?></span></span>

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例子 4

遍历并打印关联数组的所有值：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$age</span><span class="token operator">=</span><span class="token keyword"></span><mark><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Bill"</span><span class="token operator">=></span><span class="token string double-quoted-string">"60"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Steve"</span><span class="token operator">=></span><span class="token string double-quoted-string">"56"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Mark"</span><span class="token operator">=></span><span class="token string double-quoted-string">"31"</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span>

<span class="token keyword">foreach</span><span class="token punctuation">(</span><span class="token variable">$age</span> <span class="token keyword">as</span> <span class="token variable">$x</span><span class="token operator">=></span><span class="token variable">$x_value</span><span class="token punctuation">)</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"Key="</span> <span class="token operator">.</span> <span class="token variable">$x</span> <span class="token operator">.</span> <span class="token string double-quoted-string">", Value="</span> <span class="token operator">.</span> <span class="token variable">$x_value</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 punctuation">}</span>
<span class="token delimiter important">?></span></span>

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例子 5

创建多维数组：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token comment">// 二维数组：</span>
<span class="token variable">$cars</span><span class="token operator">=</span><span class="token keyword"></span><mark><span class="token keyword">array</span>
  <span class="token punctuation">(</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 number">100</span><span class="token punctuation">,</span><span class="token number">96</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  <span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"BMW"</span><span class="token punctuation">,</span><span class="token number">60</span><span class="token punctuation">,</span><span class="token number">59</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  <span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Toyota"</span><span class="token punctuation">,</span><span class="token number">110</span><span class="token punctuation">,</span><span class="token number">100</span><span class="token punctuation">)</span>
  <span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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