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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Generates a backtrace</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.errorfunc.html">Error Handling Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.debug-print-backtrace.html">debug_print_backtrace</a></div> <div class="up"><a href="ref.errorfunc.html">Error Handling Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><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)</p><p class="refpurpose"><span class="refname">debug_backtrace</span> — <span class="dc-title">Generates a backtrace</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>debug_backtrace</b></b></span> ([ <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$provide_object</tt></span> ] )</div> <p class="para rdfs-comment"> <b>debug_backtrace()</b> generates a PHP backtrace. </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an associative <a href="language.types.array.html" class="type array">array</a>. The possible returned elements are as follows: </p> <p class="para"> <table border="5"> <caption><b>Possible returned elements from <b>debug_backtrace()</b></b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Name</th> <th colspan="1">Type</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">function</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.string.html" class="type string">string</a></td> <td colspan="1" rowspan="1" align="left"> The current function name. See also <a href="language.constants.predefined.html" class="link">__FUNCTION__</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">line</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.integer.html" class="type integer">integer</a></td> <td colspan="1" rowspan="1" align="left"> The current line number. See also <a href="language.constants.predefined.html" class="link">__LINE__</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">file</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.string.html" class="type string">string</a></td> <td colspan="1" rowspan="1" align="left"> The current file name. See also <a href="language.constants.predefined.html" class="link">__FILE__</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">class</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.string.html" class="type string">string</a></td> <td colspan="1" rowspan="1" align="left"> The current <a href="language.oop.html" class="link">class</a> name. See also <a href="language.constants.predefined.html" class="link">__CLASS__</a> </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">object</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.object.html" class="type object">object</a></td> <td colspan="1" rowspan="1" align="left"> The current <a href="language.oop.html" class="link">object</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">type</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.string.html" class="type string">string</a></td> <td colspan="1" rowspan="1" align="left"> The current call type. If a method call, "->" is returned. If a static method call, "::" is returned. If a function call, nothing is returned. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">args</td> <td colspan="1" rowspan="1" align="left"><a href="language.types.array.html" class="type array">array</a></td> <td colspan="1" rowspan="1" align="left"> If inside a function, this lists the functions arguments. If inside an included file, this lists the included file name(s). </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.2.5</td> <td colspan="1" rowspan="1" align="left"> Added the optional parameter <i><tt class="parameter">provide_object</tt></i>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.1.1</td> <td colspan="1" rowspan="1" align="left"> Added the current <a href="language.types.object.html" class="type object">object</a> as a possible return element. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>debug_backtrace()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><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: $str"</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></code></div> </div> <div class="example-contents"><p> Results similar to the following when executing <var class="filename">/tmp/b.php</var>: </p></div> <div class="example-contents"><pre><div class="cdata"><pre>Hi: friendarray(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> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.trigger-error.html" class="function" rel="rdfs-seeAlso">trigger_error()</a></li> <li class="member"><a href="function.debug-print-backtrace.html" class="function" rel="rdfs-seeAlso">debug_print_backtrace()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.errorfunc.html">Error Handling Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.debug-print-backtrace.html">debug_print_backtrace</a></div> <div class="up"><a href="ref.errorfunc.html">Error Handling Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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