怎么实现分页导航功能？ - wordpress 开发

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<!--底部分页按钮-->
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<div class="navigation">
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    <div class="alignleft"><?php previous_posts_link( '上一页' ); ?></div>
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    <div class="alignright"><?php next_posts_link( '下一页', '' ); ?></div>
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</div>

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/*底部按钮样式*/
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.navigation{
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    overflow: hidden;
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}
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.alignleft{
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    float: left;
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    margin-left: 1px;
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}
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.alignright{
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    float: right;
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}
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.navigation div a{
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    border: 1px solid black;
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    border-radius: 28px;
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    padding: 0.48em 2em;
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    line-height: 2.6em;
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    -webkit-transition: 0.3s ease all;
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    -moz-transition: 0.3s ease all;
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    -ms-transition: 0.3s ease all;
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    -o-transition: 0.3s ease all;
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    transition: 0.3s ease all;
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    color: black;
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}
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.navigation div a:hover{
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    background-color: black;
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    color: white;
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}

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function fenye(){
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  $args = array(
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    'prev_next'          => 0,
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    'format'       => '?paged=%#%',
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    'before_page_number' => '',
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    'mid_size'           => 2,
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    'current' => max( 1, get_query_var('paged') ),
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    'prev_next'    => True,
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    'prev_text'    => __('上一页'),
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    'next_text'    => __('下一页'),
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  );
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  $page_arr=paginate_links($args);
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  if ($page_arr) {
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    echo $page_arr;
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  }else{
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  }
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}

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<?php fenye(); ?>