array_reduce
用回調函數迭代地將數組簡化為單一的值
中文(繁體)
中文(繁體)
向用戶自定義函數發送數組中的值，並返回一個字符串：
<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">myfunction</span> <span class="token punctuation">(</span> <span class="token variable">$v1</span> <span class="token punctuation">,</span> <span class="token variable">$v2</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token variable">$v1</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"-"</span> <span class="token operator">.</span> <span class="token variable">$v2</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Dog"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Cat"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Horse"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_reduce</span> <span class="token punctuation">(</span> <span class="token variable">$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 punctuation">;</span>
<span class="token delimiter important">?></span>
設置initial參數：
<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">myfunction</span> <span class="token punctuation">(</span> <span class="token variable">$v1</span> <span class="token punctuation">,</span> <span class="token variable">$v2</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token variable">$v1</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"-"</span> <span class="token operator">.</span> <span class="token variable">$v2</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Dog"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Cat"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Horse"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_reduce</span> <span class="token punctuation">(</span> <span class="token variable">$a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token number">5</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>
返回總和：
<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">myfunction</span> <span class="token punctuation">(</span> <span class="token variable">$v1</span> <span class="token punctuation">,</span> <span class="token variable">$v2</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token variable">$v1</span> <span class="token operator">+</span> <span class="token variable">$v2</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token number">10</span> <span class="token punctuation">,</span> <span class="token number">15</span> <span class="token punctuation">,</span> <span class="token number">20</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_reduce</span> <span class="token punctuation">(</span> <span class="token variable">$a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token number">5</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>
array_shift
arsort
array_diff
sort
each
array_walk
array_rand
array_udiff_uassoc
