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129 lines
6.8 KiB
HTML
129 lines
6.8 KiB
HTML
<!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>启动 xhprof 性能分析器</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.xhprof-enable" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">xhprof_enable</h1>
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<p class="verinfo">(PECL xhprof >= 0.9.0)</p><p class="refpurpose"><span class="refname">xhprof_enable</span> — <span class="dc-title">启动 xhprof 性能分析器</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.xhprof-enable-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>xhprof_enable</strong></span>
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([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = 0</span></span>
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[, <span class="methodparam"><span class="type">array</span> <code class="parameter">$options</code></span>
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]] ) : <span class="type"><span class="type void">void</span></span></div>
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<p class="para rdfs-comment">
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启动 xhprof 进行性能分析。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.xhprof-enable-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">flags</code></dt>
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<dd>
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<p class="para">
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分析添加额外信息的可选标记。
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关于此标记的更多信息参见
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<a href="xhprof.constants.html" class="link">XHprof 常量</a>，例如，
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<strong><code>XHPROF_FLAGS_MEMORY</code></strong>
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可以开启内存的分析。
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</p>
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</dd>
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<dt>
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<code class="parameter">options</code></dt>
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<dd>
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<p class="para">
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<span class="type"><a href="language.types.array.html" class="type array">array</a></span> 的可选选项，就是通过传递 'ignored_functions' 选项来忽略性能分析中的某些函数。
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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.xhprof-enable-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<strong><code>NULL</code></strong>
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.xhprof-enable-changelog">
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<h3 class="title">更新日志</h3>
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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>0.9.2</td>
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<td>
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添加可选的 <code class="parameter">options</code> 参数。
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="refsect1 examples" id="refsect1-function.xhprof-enable-examples">
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<h3 class="title">范例</h3>
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<div class="example" id="example-639">
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<p><strong>Example #1 <span class="function"><strong>xhprof_enable()</strong></span> 范例</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: #FF8000">// 1. elapsed time + memory + CPU profiling; and ignore built-in (internal) functions<br /></span><span style="color: #0000BB">xhprof_enable</span><span style="color: #007700">(</span><span style="color: #0000BB">XHPROF_FLAGS_NO_BUILTINS </span><span style="color: #007700">| </span><span style="color: #0000BB">XHPROF_FLAGS_CPU </span><span style="color: #007700">| </span><span style="color: #0000BB">XHPROF_FLAGS_MEMORY</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 2. elapsed time profiling; ignore call_user_func* during profiling<br /></span><span style="color: #0000BB">xhprof_enable</span><span style="color: #007700">(<br /> </span><span style="color: #0000BB">0</span><span style="color: #007700">,<br /> array(</span><span style="color: #DD0000">'ignored_functions' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'call_user_func'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'call_user_func_array'</span><span style="color: #007700">)));<br /> <br /></span><span style="color: #FF8000">// 3. elapsed time + memory profiling; ignore call_user_func* during profiling<br /></span><span style="color: #0000BB">xhprof_enable</span><span style="color: #007700">(<br /> </span><span style="color: #0000BB">XHPROF_FLAGS_MEMORY</span><span style="color: #007700">,<br /> array(</span><span style="color: #DD0000">'ignored_functions' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'call_user_func'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'call_user_func_array'</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>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.xhprof-enable-seealso">
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<h3 class="title">参见</h3>
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="xhprof_disable.html" class="function" rel="rdfs-seeAlso">xhprof_disable()</a> - 停止 xhprof 分析器</span></li>
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<li class="member"><span class="function"><a href="xhprof_sample_enable.html" class="function" rel="rdfs-seeAlso">xhprof_sample_enable()</a> - 以采样模式启动 XHProf 性能分析</span></li>
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<li class="member"><span class="function"><a href="memory_get_usage.html" class="function" rel="rdfs-seeAlso">memory_get_usage()</a> - 返回分配给 PHP 的内存量</span></li>
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<li class="member"><span class="function"><a href="getrusage.html" class="function" rel="rdfs-seeAlso">getrusage()</a> - 获取当前资源使用状况</span></li>
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</ul>
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</div>
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</div></div></div></body></html> |