function.domnode-insert-before.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>Inserts new node as child</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.domnode-has-child-nodes.html">DomNode->has_child_nodes</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.domnode-is-blank-node.html">DomNode->is_blank_node</a></div> <div class="up"><a href="ref.domxml.html">DOM XML Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.domnode-insert-before" class="refentry"> <div class="refnamediv"> <h1 class="refname">DomNode->insert_before</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">DomNode->insert_before</span> — <span class="dc-title"> Inserts new node as child </span></p> </div> <div class="refsect1 unknown"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="class.domelement.html" class="type domelement">domelement</a></span> <span class="methodname"><b><b>DomNode->insert_before</b></b></span> ( <span class="methodparam"><span class="type"><a href="class.domelement.html" class="type domelement">domelement</a></span> <tt class="parameter">$newnode</tt></span> , <span class="methodparam"><span class="type"><a href="class.domelement.html" class="type domelement">domelement</a></span> <tt class="parameter">$refnode</tt></span> )</div> <p class="para rdfs-comment"> This function inserts the new node <i><tt class="parameter">newnode</tt></i> right before the node <i><tt class="parameter">refnode</tt></i>. The return value is the inserted node. If you plan to do further modifications on the appended child you must use the returned node. </p> <p class="para"> (PHP >= 4.3 only) If <i><tt class="parameter">newnode</tt></i> already is part of a document, it will be first unlinked from its existing context. If <i><tt class="parameter">refnode</tt></i> is NULL, then <i><tt class="parameter">newnode</tt></i> will be inserted at the end of the list of children. </p> <p class="para"> <b>domnode_insert_before()</b> is very similar to <a href="function.domnode-append-child.html" class="function">domnode_append_child()</a> as the following example shows which does the same as the example at <a href="function.domnode-append-child.html" class="function">domnode_append_child()</a>. </p> <p class="para"> <div class="example"> <p><b>Example #1 Adding a child</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">include(</span><span style="color: #DD0000">"example.inc"</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">$dom </span><span style="color: #007700">= </span><span style="color: #0000BB">domxml_open_mem</span><span style="color: #007700">(</span><span style="color: #0000BB">$xmlstr</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"Error while parsing the document\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #0000BB">$elements </span><span style="color: #007700">= </span><span style="color: #0000BB">$dom</span><span style="color: #007700">-></span><span style="color: #0000BB">get_elements_by_tagname</span><span style="color: #007700">(</span><span style="color: #DD0000">"informaltable"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$elements</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$element </span><span style="color: #007700">= </span><span style="color: #0000BB">$elements</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">];<br /><br /></span><span style="color: #0000BB">$newnode </span><span style="color: #007700">= </span><span style="color: #0000BB">$element</span><span style="color: #007700">-></span><span style="color: #0000BB">insert_before</span><span style="color: #007700">(</span><span style="color: #0000BB">$element</span><span style="color: #007700">, </span><span style="color: #0000BB">$element</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$children </span><span style="color: #007700">= </span><span style="color: #0000BB">$newnode</span><span style="color: #007700">-></span><span style="color: #0000BB">children</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$attr </span><span style="color: #007700">= </span><span style="color: #0000BB">$children</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]-></span><span style="color: #0000BB">set_attribute</span><span style="color: #007700">(</span><span style="color: #DD0000">"align"</span><span style="color: #007700">, </span><span style="color: #DD0000">"left"</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"<pre>"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$xmlfile </span><span style="color: #007700">= </span><span style="color: #0000BB">$dom</span><span style="color: #007700">-></span><span style="color: #0000BB">dump_mem</span><span style="color: #007700">();<br />echo </span><span style="color: #0000BB">htmlentities</span><span style="color: #007700">(</span><span style="color: #0000BB">$xmlfile</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"</pre>"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> <p class="para"> See also <a href="function.domnode-append-child.html" class="function">domnode_append_child()</a>. </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.domnode-has-child-nodes.html">DomNode->has_child_nodes</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.domnode-is-blank-node.html">DomNode->is_blank_node</a></div> <div class="up"><a href="ref.domxml.html">DOM XML 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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