mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
286 lines
10 KiB
HTML
286 lines
10 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
|
<title>产生一条回溯跟踪(backtrace)</title>
|
|
</head>
|
|
<body class="docs"><div id="layout">
|
|
<div id="layout-content"><div id="function.debug-backtrace" class="refentry">
|
|
<div class="refnamediv">
|
|
<h1 class="refname">debug_backtrace</h1>
|
|
<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">debug_backtrace</span> — <span class="dc-title">产生一条回溯跟踪(backtrace)</span></p>
|
|
|
|
</div>
|
|
|
|
<div class="refsect1 description" id="refsect1-function.debug-backtrace-description">
|
|
<h3 class="title">说明</h3>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>debug_backtrace</strong></span>
|
|
([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$options</code><span class="initializer"> = DEBUG_BACKTRACE_PROVIDE_OBJECT</span></span>
|
|
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$limit</code><span class="initializer"> = 0</span></span>
|
|
]] ) : <span class="type">array</span></div>
|
|
|
|
<p class="para rdfs-comment">
|
|
<span class="function"><strong>debug_backtrace()</strong></span> 产生一条 PHP 的回溯跟踪(backtrace)。
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 parameters" id="refsect1-function.debug-backtrace-parameters">
|
|
<h3 class="title">参数</h3>
|
|
<p class="para">
|
|
<dl>
|
|
|
|
|
|
<dt>
|
|
<code class="parameter">options</code></dt>
|
|
|
|
<dd>
|
|
|
|
<p class="para">
|
|
截至 5.3.6，这个参数是以下选项的位掩码：
|
|
<table class="doctable table">
|
|
<caption><strong><span class="function"><strong>debug_backtrace()</strong></span> 选项</strong></caption>
|
|
|
|
<tbody class="tbody">
|
|
<tr>
|
|
<td>DEBUG_BACKTRACE_PROVIDE_OBJECT</td>
|
|
<td>
|
|
是否填充 "object" 的索引。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>DEBUG_BACKTRACE_IGNORE_ARGS</td>
|
|
<td>
|
|
是否忽略 "args" 的索引，包括所有的 function/method 的参数，能够节省内存开销。
|
|
</td>
|
|
</tr>
|
|
|
|
</tbody>
|
|
|
|
</table>
|
|
|
|
在 5.3.6 之前，仅仅能使用的值是 <strong><code>TRUE</code></strong> 或者 <strong><code>FALSE</code></strong>，分别等于是否设置 <strong><code>DEBUG_BACKTRACE_PROVIDE_OBJECT</code></strong> 选项。
|
|
</p>
|
|
</dd>
|
|
|
|
|
|
|
|
<dt>
|
|
<code class="parameter">limit</code></dt>
|
|
|
|
<dd>
|
|
|
|
<p class="para">
|
|
截至 5.4.0，这个参数能够用于限制返回堆栈帧的数量。
|
|
默认为 (<code class="parameter">limit</code>=<em>0</em>) ，返回所有的堆栈帧。
|
|
</p>
|
|
</dd>
|
|
|
|
|
|
</dl>
|
|
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 returnvalues" id="refsect1-function.debug-backtrace-returnvalues">
|
|
<h3 class="title">返回值</h3>
|
|
<p class="para">
|
|
返回一个包含众多关联数组的 <span class="type"><a href="language.types.array.html" class="type array">array</a></span>。
|
|
以为为有可能返回的元素：
|
|
</p>
|
|
<p class="para">
|
|
<table class="doctable table">
|
|
<caption><strong>有可能从 <span class="function"><strong>debug_backtrace()</strong></span> 返回的元素</strong></caption>
|
|
|
|
<thead>
|
|
<tr>
|
|
<th>名字</th>
|
|
<th>类型</th>
|
|
<th>说明</th>
|
|
</tr>
|
|
|
|
</thead>
|
|
|
|
<tbody class="tbody">
|
|
<tr>
|
|
<td>function</td>
|
|
<td><span class="type"><a href="language.types.string.html" class="type string">string</a></span></td>
|
|
<td>
|
|
当前的函数名，参见：
|
|
<a href="language.constants.predefined.html" class="link">__FUNCTION__</a>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>line</td>
|
|
<td><span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span></td>
|
|
<td>
|
|
当前的行号。参见：
|
|
<a href="language.constants.predefined.html" class="link">__LINE__</a>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>file</td>
|
|
<td><span class="type"><a href="language.types.string.html" class="type string">string</a></span></td>
|
|
<td>
|
|
当前的文件名。参见：
|
|
<a href="language.constants.predefined.html" class="link">__FILE__</a>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>class</td>
|
|
<td><span class="type"><a href="language.types.string.html" class="type string">string</a></span></td>
|
|
<td>
|
|
当前 <a href="language.oop5.html" class="link">class</a> 的名称。参见
|
|
<a href="language.constants.predefined.html" class="link">__CLASS__</a>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>object</td>
|
|
<td><span class="type"><a href="language.types.object.html" class="type object">object</a></span></td>
|
|
<td>
|
|
当前的 <a href="language.oop5.html" class="link">object</a>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>type</td>
|
|
<td><span class="type"><a href="language.types.string.html" class="type string">string</a></span></td>
|
|
<td>
|
|
当前调用的类型。如果是一个方法，会返回 "->"。如果是一个静态方法，会返回 "::"。
|
|
如果是一个函数调用，则返回空。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>args</td>
|
|
<td><span class="type"><a href="language.types.array.html" class="type array">array</a></span></td>
|
|
<td>
|
|
如果在一个函数里，这会列出函数的参数。
|
|
如果是在一个被包含的文件里，会列出包含的文件名。
|
|
</td>
|
|
</tr>
|
|
|
|
</tbody>
|
|
|
|
</table>
|
|
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 changelog" id="refsect1-function.debug-backtrace-changelog">
|
|
<h3 class="title">更新日志</h3>
|
|
<p class="para">
|
|
<table class="doctable informaltable">
|
|
|
|
<thead>
|
|
<tr>
|
|
<th>版本</th>
|
|
<th>说明</th>
|
|
</tr>
|
|
|
|
</thead>
|
|
|
|
<tbody class="tbody">
|
|
<tr>
|
|
<td>5.4.0</td>
|
|
<td>
|
|
添加了可选的参数 <code class="parameter">limit</code>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>5.3.6</td>
|
|
<td>
|
|
参数 <code class="parameter">provide_object</code> 改成 <code class="parameter">options</code>，并且增加了可选参数
|
|
<strong><code>DEBUG_BACKTRACE_IGNORE_ARGS</code></strong>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>5.2.5</td>
|
|
<td>
|
|
添加了可选参数 <code class="parameter">provide_object</code>。
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>5.1.1</td>
|
|
<td>
|
|
添加了当前的 <span class="type"><a href="language.types.object.html" class="type object">object</a></span> 为可能返回的元素。
|
|
</td>
|
|
</tr>
|
|
|
|
</tbody>
|
|
|
|
</table>
|
|
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 examples" id="refsect1-function.debug-backtrace-examples">
|
|
<h3 class="title">范例</h3>
|
|
<p class="para">
|
|
<div class="example" id="example-456">
|
|
<p><strong>Example #1 <span class="function"><strong>debug_backtrace()</strong></span> 范例</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// filename: /tmp/a.php<br /><br /></span><span style="color: #007700">function </span><span style="color: #0000BB">a_test</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">)<br />{<br /> echo </span><span style="color: #DD0000">"\nHi: </span><span style="color: #0000BB">$str</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">debug_backtrace</span><span style="color: #007700">());<br />}<br /><br /></span><span style="color: #0000BB">a_test</span><span style="color: #007700">(</span><span style="color: #DD0000">'friend'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?><br /></span><br /><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// filename: /tmp/b.php<br /></span><span style="color: #007700">include_once </span><span style="color: #DD0000">'/tmp/a.php'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
<div class="example-contents"><p>
|
|
执行 <var class="filename">/tmp/b.php</var> 返回的结果类似于以下：
|
|
</p></div>
|
|
<div class="example-contents screen">
|
|
<div class="cdata"><pre>
|
|
Hi: friend
|
|
array(2) {
|
|
[0]=>
|
|
array(4) {
|
|
["file"] => string(10) "/tmp/a.php"
|
|
["line"] => int(10)
|
|
["function"] => string(6) "a_test"
|
|
["args"]=>
|
|
array(1) {
|
|
[0] => &string(6) "friend"
|
|
}
|
|
}
|
|
[1]=>
|
|
array(4) {
|
|
["file"] => string(10) "/tmp/b.php"
|
|
["line"] => int(2)
|
|
["args"] =>
|
|
array(1) {
|
|
[0] => string(10) "/tmp/a.php"
|
|
}
|
|
["function"] => string(12) "include_once"
|
|
}
|
|
}
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 seealso" id="refsect1-function.debug-backtrace-seealso">
|
|
<h3 class="title">参见</h3>
|
|
<p class="para">
|
|
<ul class="simplelist">
|
|
<li class="member"><span class="function"><a href="trigger_error.html" class="function" rel="rdfs-seeAlso">trigger_error()</a> - 产生一个用户级别的 error/warning/notice 信息</span></li>
|
|
<li class="member"><span class="function"><a href="debug_print_backtrace.html" class="function" rel="rdfs-seeAlso">debug_print_backtrace()</a> - 打印一条回溯。</span></li>
|
|
</ul>
|
|
</p>
|
|
</div>
|
|
|
|
</div></div></div></body></html> |