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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>返回由对象属性组成的关联数组</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.get-object-vars" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">get_object_vars</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">get_object_vars</span> — <span class="dc-title">返回由对象属性组成的关联数组</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.get-object-vars-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>get_object_vars</strong></span>
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( <span class="methodparam"><span class="type">object</span> <code class="parameter">$obj</code></span>
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) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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返回由 <code class="parameter">obj</code>
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指定的对象中定义的属性组成的关联数组。
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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在 PHP 4.2.0 之前的版本中，如果在 <code class="parameter">obj</code>
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对象实例中声明的变量没有被赋值，则它们将不会在返回的数组中。而在
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PHP 4.2.0 之后，这些变量作为键名将被赋予 <strong><code>NULL</code></strong> 值。
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</p>
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</p></blockquote>
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<p class="para">
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<div class="example" id="example-6142">
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<p><strong>Example #1 使用 <span class="function"><strong>get_object_vars()</strong></span></strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">Point2D </span><span style="color: #007700">{<br /> var </span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">;<br /> var </span><span style="color: #0000BB">$label</span><span style="color: #007700">;<br /><br /> function </span><span style="color: #0000BB">Point2D</span><span style="color: #007700">(</span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">)<br /> {<br /> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">x </span><span style="color: #007700">= </span><span style="color: #0000BB">$x</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">y </span><span style="color: #007700">= </span><span style="color: #0000BB">$y</span><span style="color: #007700">;<br /> }<br /><br /> function </span><span style="color: #0000BB">setLabel</span><span style="color: #007700">(</span><span style="color: #0000BB">$label</span><span style="color: #007700">)<br /> {<br /> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">label </span><span style="color: #007700">= </span><span style="color: #0000BB">$label</span><span style="color: #007700">;<br /> }<br /><br /> function </span><span style="color: #0000BB">getPoint</span><span style="color: #007700">()<br /> {<br /> return array(</span><span style="color: #DD0000">"x" </span><span style="color: #007700">=> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">x</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">"y" </span><span style="color: #007700">=> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">y</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">"label" </span><span style="color: #007700">=> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">label</span><span style="color: #007700">);<br /> }<br />}<br /><br /></span><span style="color: #FF8000">// "$label" is declared but not defined<br /></span><span style="color: #0000BB">$p1 </span><span style="color: #007700">= new </span><span style="color: #0000BB">Point2D</span><span style="color: #007700">(</span><span style="color: #0000BB">1.233</span><span style="color: #007700">, </span><span style="color: #0000BB">3.445</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">get_object_vars</span><span style="color: #007700">(</span><span style="color: #0000BB">$p1</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">$p1</span><span style="color: #007700">-></span><span style="color: #0000BB">setLabel</span><span style="color: #007700">(</span><span style="color: #DD0000">"point #1"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">get_object_vars</span><span style="color: #007700">(</span><span style="color: #0000BB">$p1</span><span style="color: #007700">));<br /><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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[x] => 1.233
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[y] => 3.445
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[label] =>
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)
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Array
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(
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[x] => 1.233
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[y] => 3.445
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[label] => point #1
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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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参见 <span class="function"><a href="get_class_methods.html" class="function">get_class_methods()</a></span> 和
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<span class="function"><a href="get_class_vars.html" class="function">get_class_vars()</a></span>。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.get-object-vars-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">object</code></dt>
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<dd>
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<p class="para">
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An object instance.
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</p>
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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.get-object-vars-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns an associative array of defined object accessible non-static properties
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for the specified <code class="parameter">object</code> in scope. If a property have
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not been assigned a value, it will be returned with a <strong><code>NULL</code></strong> value.
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.get-object-vars-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.3.0</td>
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<td>
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This function now returns <span class="type"><a href="language.types.null.html" class="type NULL">NULL</a></span> if the
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<code class="parameter">object</code> isn't an object.
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</td>
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</tr>
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<tr>
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<td>prior to 5.3.0</td>
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<td>
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If the <code class="parameter">object</code> isn't an object, then
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<span class="function"><strong>get_object_vars()</strong></span> would return <strong><code>FALSE</code></strong>
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</td>
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</tr>
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<tr>
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<td>prior to 4.2.0</td>
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<td>
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If the variables declared in the class of which the
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<code class="parameter">object</code> is an instance, have not been assigned a
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value, those will not be returned in the array
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.get-object-vars-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-6143">
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<p><strong>Example #2 Use of <span class="function"><strong>get_object_vars()</strong></span></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 /><br /></span><span style="color: #007700">class </span><span style="color: #0000BB">foo </span><span style="color: #007700">{<br /> private </span><span style="color: #0000BB">$a</span><span style="color: #007700">;<br /> public </span><span style="color: #0000BB">$b </span><span style="color: #007700">= </span><span style="color: #0000BB">1</span><span style="color: #007700">;<br /> public </span><span style="color: #0000BB">$c</span><span style="color: #007700">;<br /> private </span><span style="color: #0000BB">$d</span><span style="color: #007700">;<br /> static </span><span style="color: #0000BB">$e</span><span style="color: #007700">;<br /> <br /> public function </span><span style="color: #0000BB">test</span><span style="color: #007700">() {<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">get_object_vars</span><span style="color: #007700">(</span><span style="color: #0000BB">$this</span><span style="color: #007700">));<br /> }<br />}<br /><br /></span><span style="color: #0000BB">$test </span><span style="color: #007700">= new </span><span style="color: #0000BB">foo</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">get_object_vars</span><span style="color: #007700">(</span><span style="color: #0000BB">$test</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">$test</span><span style="color: #007700">-></span><span style="color: #0000BB">test</span><span style="color: #007700">();<br /><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(2) {
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["b"]=>
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int(1)
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["c"]=>
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NULL
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}
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array(4) {
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["a"]=>
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NULL
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["b"]=>
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int(1)
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["c"]=>
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NULL
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["d"]=>
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NULL
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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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</div>
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<div class="refsect1 seealso" id="refsect1-function.get-object-vars-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="get_class_methods.html" class="function" rel="rdfs-seeAlso">get_class_methods()</a> - 返回由类的方法名组成的数组</span></li>
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<li class="member"><span class="function"><a href="get_class_vars.html" class="function" rel="rdfs-seeAlso">get_class_vars()</a> - 返回由类的默认属性组成的数组</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> |