array_udiff

實例

例子1

比較兩個數組的鍵值（使用用戶自定義函數比較鍵值），並返回差集：

 <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">$a</span> <span class="token punctuation">,</span> <span class="token variable">$b</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 variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span> <span class="token punctuation">)</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token number">0</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
  <span class="token keyword">return</span> <span class="token punctuation">(</span> <span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span> <span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span> <span class="token number">1</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token variable">$a1</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token variable">$a2</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">"blue"</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">"black"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"e"</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 variable">$result</span> <span class="token operator">=</span><span class="token function"></span></span><mark> <span class="token function">array_udiff</span> <span class="token punctuation">(</span> <span class="token variable">$a1</span> <span class="token punctuation">,</span> <span class="token variable">$a2</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span> <span class="token variable">$result</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

親自試一試

例子2

比較三個數組的鍵值（使用用戶自定義函數比較鍵值），並返回差集：

 <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">$a</span> <span class="token punctuation">,</span> <span class="token variable">$b</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 variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span> <span class="token punctuation">)</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token number">0</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
  <span class="token keyword">return</span> <span class="token punctuation">(</span> <span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span> <span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span> <span class="token number">1</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token variable">$a1</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"yellow"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token variable">$a2</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">"yellow"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"black"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token variable">$a3</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">"green"</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">"red"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"yellow"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"black"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>

<span class="token variable">$result</span> <span class="token operator">=</span><span class="token function"></span></span><mark> <span class="token function">array_udiff</span> <span class="token punctuation">(</span> <span class="token variable">$a1</span> <span class="token punctuation">,</span> <span class="token variable">$a2</span> <span class="token punctuation">,</span> <span class="token variable">$a3</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">$result</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>

<span class="token delimiter important">?></span>

親自試一試