前面的教程中，我们已经介绍了的方法。站长朋友们在使用的过程中，通常还需要自定义不同分类页面每页显示条数。比如新闻分类页面我们希望每页显示10条新闻，而产品分类页面，我们希望每页显示9个产品。这篇教程里，我们就向大家介绍一下方法。

切换到主题目录，打开functions.PHP 文件，加入以下代码：

Crayon-5c891ce0c3aef113607351" class="Crayon-Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouSEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;">

Crayon-toolbar" data-settings=" mouSEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">Crayon-title">functions.PHP

Crayon-tools" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">

Crayon-button Crayon-nums-button" title="Toggle Line Numbers">

Crayon-button-icon">

Crayon-button Crayon-plain-button" title="Toggle Plain Code">

Crayon-button-icon">

Crayon-button Crayon-wrap-button" title="Toggle Line Wrap">

Crayon-button-icon">

Crayon-button Crayon-expand-button" title="Expand Code">

Crayon-button-icon">

Crayon-button Crayon-copy-button" title="Copy">

Crayon-button-icon">

Crayon-button Crayon-popup-button" title="Open Code In New Window">

Crayon-button-icon">

Crayon-language">PHP

Crayon-info" style="min-height: 16.8px !important; line-height: 16.8px !important;">

Crayon-plain-wrap">

is_main_query()) {
        return;
    }
    if ( is_category('<a href="/tag/fenleimulu/" target="_blank" class="keywords">分类目录</a>的ID')) {
        $query->set('posts_per_page',9);
    }
}
add_action( 'pre_get_posts','main_query_mods' );

Crayon-main" style="">Crayon-table">Crayon-row">

Crayon-nums " data-settings="show">

Crayon-nums-content" style="font-size: 12px !important; line-height: 15px !important;">

Crayon-num" data-line="Crayon-5c891ce0c3aef113607351-1">1

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce0c3aef113607351-2">2

Crayon-num" data-line="Crayon-5c891ce0c3aef113607351-3">3

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce0c3aef113607351-4">4

Crayon-num" data-line="Crayon-5c891ce0c3aef113607351-5">5

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce0c3aef113607351-6">6

Crayon-num" data-line="Crayon-5c891ce0c3aef113607351-7">7

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce0c3aef113607351-8">8

Crayon-num" data-line="Crayon-5c891ce0c3aef113607351-9">9

Crayon-code">

Crayon-pre" style="font-size: 12px !important; line-height: 15px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;">

Crayon-line" id="Crayon-5c891ce0c3aef113607351-1">Crayon-t">functionCrayon-h"> Crayon-e">main_query_modsCrayon-sy">(Crayon-h"> Crayon-v">$queryCrayon-h"> Crayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line Crayon-striped-line" id="Crayon-5c891ce0c3aef113607351-2">Crayon-h">Crayon-st">ifCrayon-sy">(Crayon-o">!Crayon-v">$queryCrayon-e">is_main_queryCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line" id="Crayon-5c891ce0c3aef113607351-3">Crayon-h">Crayon-k ">returnCrayon-sy">;

Crayon-line Crayon-striped-line" id="Crayon-5c891ce0c3aef113607351-4">Crayon-h">Crayon-sy">}

Crayon-line" id="Crayon-5c891ce0c3aef113607351-5">Crayon-h">Crayon-st">ifCrayon-h"> Crayon-sy">(Crayon-h"> Crayon-e">is_categoryCrayon-sy">(Crayon-s">'分类目录的ID'Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line Crayon-striped-line" id="Crayon-5c891ce0c3aef113607351-6">Crayon-h">Crayon-v">$queryCrayon-e">setCrayon-sy">(Crayon-s">'posts_per_page'Crayon-sy">,Crayon-cn">9Crayon-sy">)Crayon-sy">;

Crayon-line" id="Crayon-5c891ce0c3aef113607351-7">Crayon-h">Crayon-sy">}

Crayon-line Crayon-striped-line" id="Crayon-5c891ce0c3aef113607351-8">Crayon-sy">}

Crayon-line" id="Crayon-5c891ce0c3aef113607351-9">Crayon-e">add_actionCrayon-sy">(Crayon-h"> Crayon-s">'pre_get_posts'Crayon-sy">,Crayon-h"> Crayon-s">'main_query_mods'Crayon-h"> Crayon-sy">)Crayon-sy">;

分页分页分页每页显示条数