📄 function.xml-set-start-namespace-decl-handler.html
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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>Set up start namespace declaration handler</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="function.xml-set-processing-instruction-handler.html">xml_set_processing_instruction_handler</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.xml-set-unparsed-entity-decl-handler.html">xml_set_unparsed_entity_decl_handler</a></div> <div class="up"><a href="ref.xml.html">XML Parser Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.xml-set-start-namespace-decl-handler" class="refentry"> <div class="refnamediv"> <h1 class="refname">xml_set_start_namespace_decl_handler</h1> <p class="verinfo">(PHP 4 >= 4.0.5, PHP 5)</p><p class="refpurpose"><span class="refname">xml_set_start_namespace_decl_handler</span> — <span class="dc-title"> Set up start namespace declaration handler </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>xml_set_start_namespace_decl_handler</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$parser</tt></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.callback" class="type callback">callback</a></span> <tt class="parameter">$handler</tt></span> )</div> <p class="para rdfs-comment"> Set a handler to be called when a namespace is declared. Namespace declarations occur inside start tags. But the namespace declaration start handler is called before the start tag handler for each namespace declared in that start tag. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">parser</tt></i></span> <dd> <p class="para"> A reference to the XML parser. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">handler</tt></i></span> <dd> <p class="para"> <i><tt class="parameter">handler</tt></i> is a string containing the name of a function that must exist when <a href="function.xml-parse.html" class="function">xml_parse()</a> is called for <i><tt class="parameter">parser</tt></i>. </p> <p class="para"> The function named by <i><tt class="parameter">handler</tt></i> must accept four parameters, and should return an integer value. If the value returned from the handler is <b><tt>FALSE</tt></b> (which it will be if no value is returned), the XML parser will stop parsing and <a href="function.xml-get-error-code.html" class="function">xml_get_error_code()</a> will return <b><tt>XML_ERROR_EXTERNAL_ENTITY_HANDLING</tt></b>. <div class="methodsynopsis dc-description"> <span class="methodname"><b><span class="replaceable">handler</span></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$parser</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$user_data</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$prefix</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$uri</tt></span> )</div> <dl> <dt> <span class="term"><i><tt class="parameter">parser</tt></i></span> <dd> <span class="simpara"> The first parameter, <span class="replaceable">parser</span>, is a reference to the XML parser calling the handler. </span> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">user_data</tt></i></span> <dd> <span class="simpara"> </span> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">prefix</tt></i></span> <dd> <span class="simpara"> </span> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">uri</tt></i></span> <dd> <span class="simpara"> </span> </dd> </dt> </dl> </p> <p class="para"> If a handler function is set to an empty string, or <b><tt>FALSE</tt></b>, the handler in question is disabled. </p> <blockquote><p><b class="note">Note</b>: <span class="simpara">Instead of a function name, anarray containing an object reference and a method name can also besupplied.</span></p></blockquote> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.xml-set-end-namespace-decl-handler.html" class="function" rel="rdfs-seeAlso">xml_set_end_namespace_decl_handler()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.xml-set-processing-instruction-handler.html">xml_set_processing_instruction_handler</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.xml-set-unparsed-entity-decl-handler.html">xml_set_unparsed_entity_decl_handler</a></div> <div class="up"><a href="ref.xml.html">XML Parser 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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