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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>带索引检查计算数组的差集，用回调函数比较数据</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.array-udiff-assoc" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">array_udiff_assoc</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">array_udiff_assoc</span> — <span class="dc-title">带索引检查计算数组的差集，用回调函数比较数据</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.array-udiff-assoc-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>array_udiff_assoc</strong></span>
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( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array1</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$array2</code></span>
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[, <span class="methodparam"><span class="type">array</span> <code class="parameter">$...</code></span>
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], <span class="methodparam"><span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$value_compare_func</code></span>
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) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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此比较是通过用户提供的回调函数来进行的。如果认为第一个参数小于，等于，或大于第二个参数时必须分别返回一个小于零，等于零，或大于零的整数。
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<span class="simpara">
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注意本函数只检查了多维数组中的一维。当然，可以用
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<em>array_udiff_assoc($array1[0], $array2[0], "some_comparison_func");</em>
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来检查更深的维度。
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</span>
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</p></blockquote>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.array-udiff-assoc-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">array1</code></dt>
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<dd>
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<p class="para">
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第一个数组。
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</p>
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</dd>
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<dt>
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<code class="parameter">array2</code></dt>
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<dd>
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<p class="para">
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第二个数组。
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</p>
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</dd>
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<dt>
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<code class="parameter">value_compare_func</code></dt>
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<dd>
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<p class="para">
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在第一个参数小于，等于或大于第二个参数时，该比较函数必须相应地返回一个小于，等于或大于 0 的整数。
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</p>
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<div class="methodsynopsis dc-description"><span class="methodname"><span class="replaceable">callback</span></span> ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$a</code></span>, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$b</code></span> ) : <span class="type">int</span></div>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.array-udiff-assoc-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<span class="function"><strong>array_udiff_assoc()</strong></span> 返回一个数组，该数组包括了所有在
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<code class="parameter">array1</code> 中但是不在任何其它参数数组中的值。注意和
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<span class="function"><a href="array_diff.html" class="function">array_diff()</a></span> 与 <span class="function"><a href="array_udiff.html" class="function">array_udiff()</a></span>
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不同的是键名也用于比较。数组数据的比较是用用户提供的回调函数进行的。在此方面和
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<span class="function"><a href="array_diff_assoc.html" class="function">array_diff_assoc()</a></span> 的行为正好相反，后者是用内部函数进行比较的。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.array-udiff-assoc-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-6070">
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<p><strong>Example #1 <span class="function"><strong>array_udiff_assoc()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">cr </span><span style="color: #007700">{<br /> private </span><span style="color: #0000BB">$priv_member</span><span style="color: #007700">;<br /> function </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">$val</span><span style="color: #007700">)<br /> {<br /> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member </span><span style="color: #007700">= </span><span style="color: #0000BB">$val</span><span style="color: #007700">;<br /> }<br /><br /> static function </span><span style="color: #0000BB">comp_func_cr</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">)<br /> {<br /> if (</span><span style="color: #0000BB">$a</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member </span><span style="color: #007700">=== </span><span style="color: #0000BB">$b</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member</span><span style="color: #007700">) return </span><span style="color: #0000BB">0</span><span style="color: #007700">;<br /> return (</span><span style="color: #0000BB">$a</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member </span><span style="color: #007700">> </span><span style="color: #0000BB">$b</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member</span><span style="color: #007700">)? </span><span style="color: #0000BB">1</span><span style="color: #007700">:-</span><span style="color: #0000BB">1</span><span style="color: #007700">;<br /> }<br />}<br /><br /></span><span style="color: #0000BB">$a </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"0.1" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">9</span><span style="color: #007700">), </span><span style="color: #DD0000">"0.5" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">12</span><span style="color: #007700">), </span><span style="color: #0000BB">0 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">23</span><span style="color: #007700">), </span><span style="color: #0000BB">1</span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">4</span><span style="color: #007700">), </span><span style="color: #0000BB">2 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(-</span><span style="color: #0000BB">15</span><span style="color: #007700">),);<br /></span><span style="color: #0000BB">$b </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"0.2" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">9</span><span style="color: #007700">), </span><span style="color: #DD0000">"0.5" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">22</span><span style="color: #007700">), </span><span style="color: #0000BB">0 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">3</span><span style="color: #007700">), </span><span style="color: #0000BB">1</span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">4</span><span style="color: #007700">), </span><span style="color: #0000BB">2 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(-</span><span style="color: #0000BB">15</span><span style="color: #007700">),);<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_udiff_assoc</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"cr"</span><span style="color: #007700">, </span><span style="color: #DD0000">"comp_func_cr"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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Array
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(
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[0.1] => cr Object
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(
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[priv_member:private] => 9
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)
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[0.5] => cr Object
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(
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[priv_member:private] => 12
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)
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[0] => cr Object
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(
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[priv_member:private] => 23
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)
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)
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</pre></div>
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</div>
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</div>
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</p>
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<p class="simpara">
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上例中可以看到键值对 <em>"1" => new cr(4)</em>
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同时出现在两个数组中因此不在本函数的输出中。
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.array-udiff-assoc-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="array_diff.html" class="function" rel="rdfs-seeAlso">array_diff()</a> - 计算数组的差集</span></li>
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<li class="member"><span class="function"><a href="array_diff_assoc.html" class="function" rel="rdfs-seeAlso">array_diff_assoc()</a> - 带索引检查计算数组的差集</span></li>
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<li class="member"><span class="function"><a href="array_diff_uassoc.html" class="function" rel="rdfs-seeAlso">array_diff_uassoc()</a> - 用用户提供的回调函数做索引检查来计算数组的差集</span></li>
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<li class="member"><span class="function"><a href="array_udiff.html" class="function" rel="rdfs-seeAlso">array_udiff()</a> - 用回调函数比较数据来计算数组的差集</span></li>
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<li class="member"><span class="function"><a href="array_udiff_uassoc.html" class="function" rel="rdfs-seeAlso">array_udiff_uassoc()</a> - 带索引检查计算数组的差集，用回调函数比较数据和索引</span></li>
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<li class="member"><span class="function"><a href="array_intersect.html" class="function" rel="rdfs-seeAlso">array_intersect()</a> - 计算数组的交集</span></li>
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<li class="member"><span class="function"><a href="array_intersect_assoc.html" class="function" rel="rdfs-seeAlso">array_intersect_assoc()</a> - 带索引检查计算数组的交集</span></li>
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<li class="member"><span class="function"><a href="array_uintersect.html" class="function" rel="rdfs-seeAlso">array_uintersect()</a> - 计算数组的交集，用回调函数比较数据</span></li>
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<li class="member"><span class="function"><a href="array_uintersect_assoc.html" class="function" rel="rdfs-seeAlso">array_uintersect_assoc()</a> - 带索引检查计算数组的交集，用回调函数比较数据</span></li>
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<li class="member"><span class="function"><a href="array_uintersect_uassoc.html" class="function" rel="rdfs-seeAlso">array_uintersect_uassoc()</a> - 带索引检查计算数组的交集，用单独的回调函数比较数据和索引</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |