WordPress中用于获取搜索表单的PHP函数使用解析
<p>get_search_form 函数在 WordPress 中是用来提取预设的搜索表单或者默认的搜索表单的。因为官方这个函数没有中文的，所以我就简单写了一下。</p>
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<strong>描述</strong><br>
get_search_form 函数在 WordPress 中是用来提取自定义搜索表单或者默认的搜索表单的。<br>
显示自定义表单还是显示默认表单，完全取决于您的主题中是否有search.php文件，<br>
如果有该文件，则自动调用该文件，如果没有则显示默认的搜索表单。</p>
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<strong>使用</strong></p>
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<code><?php</code>
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<code> </code><code>get_search_form(</code><code>$echo</code> <code>= true) </code>
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<code>?></code>
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<strong>参数</strong><br>
$echo 布尔型，用来选择显示还是返回变量。<br>
默认值：true</p>
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<strong>实例</strong><br>
没你想象的复杂，其实就是这么简单。</p>
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<code> </code><code>get_search_form(); </code>
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这里提一下，如果你需要整合谷歌自定义搜索那些的话，<br>
你只要在你的search.php 文件中将自定义的部分代码放入即可喽，当然你需要设定样式。</p>
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<strong>函数源代码</strong></p>
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<code> </code><code>/**</code>
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<code> </code><code>* Display search form.</code>
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<code> </code><code>*</code>
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<code> </code><code>* Will first attempt to locate the searchform.php file in either the child or</code>
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<code> </code><code>* the parent, then load it. If it doesn't exist, then the default search form</code>
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<code> </code><code>* will be displayed. The default search form is HTML, which will be displayed.</code>
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<code> </code><code>* There is a filter applied to the search form HTML in order to edit or replace</code>
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<code> </code><code>* it. The filter is 'get_search_form'.</code>
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<code> </code><code>*</code>
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<code> </code><code>* This function is primarily used by themes which want to hardcode the search</code>
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<code> </code><code>* form into the sidebar and also by the search widget in WordPress.</code>
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<code> </code><code>*</code>
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<code> </code><code>* There is also an action that is called whenever the function is run called,</code>
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<code> </code><code>* 'get_search_form'. This can be useful for outputting JavaScript that the</code>
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<code> </code><code>* search relies on or various formatting that applies to the beginning of the</code>
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<code> </code><code>* search. To give a few examples of what it can be used for.</code>
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<code> </code><code>*</code>
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<code> </code><code>* @since 2.7.0</code>
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<code> </code><code>* @param boolean $echo Default to echo and not return the form.</code>
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<code> </code><code>*/</code>
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<code>function</code> <code>get_search_form(</code><code>$echo</code> <code>= true) {</code>
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<code> </code><code>do_action( </code><code>'get_search_form'</code> <code>);</code>
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<code> </code>
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<code> </code><code>$search_form_template</code> <code>= locate_template(</code><code>'searchform.php'</code><code>);</code>
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<code> </code><code>if</code> <code>( </code><code>''</code> <code>!= </code><code>$search_form_template</code> <code>) {</code>
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<code> </code><code>require</code><code>(</code><code>$search_form_template</code><code>);</code>
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<code> </code><code>return</code><code>;</code>
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<code> </code><code>}</code>
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<code> </code>
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<code> </code><code>$form</code> <code>= </code><code>'<form role="search" method="get" id="searchform" action="'</code> <code>. esc_url( home_url( </code><code>'/'</code> <code>) ) . '" ></code>
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<code> </code><code><div><label </code><code>class</code><code>=</code><code>"screen-reader-text"</code> <code>for</code><code>=</code><code>"s"</code><code>></code><code>' . __('</code><code>Search </code><code>for</code><code>:</code><code>') . '</code><code></label></code>
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<code> </code><code><input type=</code><code>"text"</code> <code>value=</code><code>"' . get_search_query() . '"</code> <code>name=</code><code>"s"</code> <code>id=</code><code>"s"</code> <code>/></code>
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<code> </code><code><input type=</code><code>"submit"</code> <code>id=</code><code>"searchsubmit"</code> <code>value=</code><code>"'. esc_attr__('Search') .'"</code> <code>/></code>
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<code> </code><code></div></code>
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<code> </code><code></form>';</code>
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<code> </code>
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<code> </code><code>if</code> <code>( </code><code>$echo</code> <code>)</code>
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<code> </code><code>echo</code> <code>apply_filters(</code><code>'get_search_form'</code><code>, </code><code>$form</code><code>);</code>
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<code> </code><code>else</code>
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<code> </code><code>return</code> <code>apply_filters(</code><code>'get_search_form'</code><code>, </code><code>$form</code><code>);</code>
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<code>}</code>
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