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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>Call a user function given with an array of parameters</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.funchand.html">Function handling Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.call-user-func.html">call_user_func</a></div> <div class="up"><a href="ref.funchand.html">Function handling Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.call-user-func-array" class="refentry"> <div class="refnamediv"> <h1 class="refname">call_user_func_array</h1> <p class="verinfo">(PHP 4 >= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">call_user_func_array</span> — <span class="dc-title">Call a user function given with an array of parameters</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><b><b>call_user_func_array</b></b></span> ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.callback" class="type callback">callback</a></span> <tt class="parameter">$function</tt></span> , <span class="methodparam"><span class="type">array</span> <tt class="parameter">$param_arr</tt></span> )</div> <p class="para rdfs-comment"> Call a user defined <i><tt class="parameter">function</tt></i> with the parameters in <i><tt class="parameter">param_arr</tt></i>. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">function</tt></i></span> <dd> <p class="para"> The function to be called. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">param_arr</tt></i></span> <dd> <p class="para"> The parameters to be passed to the function, as an indexed array. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the function result, or <b><tt>FALSE</tt></b> on error. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>call_user_func_array()</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: #007700">function </span><span style="color: #0000BB">debug</span><span style="color: #007700">(</span><span style="color: #0000BB">$var</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">)<br />{<br /> echo </span><span style="color: #DD0000">"***DEBUGGING\nVARIABLE: $var\nVALUE:"</span><span style="color: #007700">;<br /> if (</span><span style="color: #0000BB">is_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$val</span><span style="color: #007700">) || </span><span style="color: #0000BB">is_object</span><span style="color: #007700">(</span><span style="color: #0000BB">$val</span><span style="color: #007700">) || </span><span style="color: #0000BB">is_resource</span><span style="color: #007700">(</span><span style="color: #0000BB">$val</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$val</span><span style="color: #007700">);<br /> } else {<br /> echo </span><span style="color: #DD0000">"\n$val\n"</span><span style="color: #007700">;<br /> }<br /> echo </span><span style="color: #DD0000">"***\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">$c </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$host </span><span style="color: #007700">= </span><span style="color: #0000BB">$_SERVER</span><span style="color: #007700">[</span><span style="color: #DD0000">"SERVER_NAME"</span><span style="color: #007700">];<br /><br /></span><span style="color: #0000BB">call_user_func_array</span><span style="color: #007700">(</span><span style="color: #DD0000">'debug'</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"host"</span><span style="color: #007700">, </span><span style="color: #0000BB">$host</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">call_user_func_array</span><span style="color: #007700">(</span><span style="color: #DD0000">'debug'</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #0000BB">$c</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">call_user_func_array</span><span style="color: #007700">(</span><span style="color: #DD0000">'debug'</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"_POST"</span><span style="color: #007700">, </span><span style="color: #0000BB">$_POST</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <div class="example"> <p><b>Example #2 <b>call_user_func_array()</b> using namespace name</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />namespace Foobar</span><span style="color: #007700">;<br /><br />class </span><span style="color: #0000BB">Foo </span><span style="color: #007700">{<br /> static public function </span><span style="color: #0000BB">test</span><span style="color: #007700">(</span><span style="color: #0000BB">$name</span><span style="color: #007700">) {<br /> print </span><span style="color: #DD0000">"Hello {$name}!\n"</span><span style="color: #007700">;<br /> }<br />}<br /><br /></span><span style="color: #FF8000">// As of PHP 5.3.0<br /></span><span style="color: #0000BB">call_user_func_array</span><span style="color: #007700">(</span><span style="color: #0000BB">__NAMESPACE__ </span><span style="color: #007700">.</span><span style="color: #DD0000">'::Foo::test'</span><span style="color: #007700">, array(</span><span style="color: #DD0000">'Hannes'</span><span style="color: #007700">));<br /></span><span style="color: #FF8000">// Hello Hannes!<br /><br />// As of PHP 5.3.0<br /></span><span style="color: #0000BB">call_user_func_array</span><span style="color: #007700">(array(</span><span style="color: #0000BB">__NAMESPACE__ </span><span style="color: #007700">.</span><span style="color: #DD0000">'::Foo'</span><span style="color: #007700">, </span><span style="color: #DD0000">'test'</span><span style="color: #007700">), array(</span><span style="color: #DD0000">'Philip'</span><span style="color: #007700">));<br /></span><span style="color: #FF8000">// Hello Philip!<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <div class="example"> <p><b>Example #3 Using lambda function</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$func </span><span style="color: #007700">= function(</span><span style="color: #0000BB">$arg1</span><span style="color: #007700">, </span><span style="color: #0000BB">$arg2</span><span style="color: #007700">) {<br /> return </span><span style="color: #0000BB">$arg1 </span><span style="color: #007700">* </span><span style="color: #0000BB">$arg2</span><span style="color: #007700">;<br />};<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">call_user_func</span><span style="color: #007700">(</span><span style="color: #0000BB">$func</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">)); </span><span style="color: #FF8000">/* As of PHP 5.3.0 */<br />// int(8)<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: Referenced variables in <i><tt class="parameter">param_arr</tt></i> are passed to the function by a reference, others are passed by a value. In other words, it does not depend on the function signature whether the parameter is passed by a value or by a reference. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.call-user-func.html" class="function" rel="rdfs-seeAlso">call_user_func()</a></li> <li class="member">information about the <a href="language.pseudo-types.html#language.types.callback" class="link">callback</a> type</li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.funchand.html">Function handling Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.call-user-func.html">call_user_func</a></div> <div class="up"><a href="ref.funchand.html">Function 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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