WordPress中自定义不同归档页面每页显示条数

在wordpress的后台设置中，我们可以通过 阅读 > 博客页面至多显示 设置每页最多显示的文章数目，但此设置只能将所有的类别（首页、分类目录页、标签页、作者页）显示的文章数都设置成一个固定值。

使用wordpress 建站的过程中，如果我们想给不同归档页面（首页、分类目录页、标签页、作者页）自定义每页显示条数。比如首页每页最多显示10篇文章，分类页每页最多显示20篇文章，标签页每页最多显示30篇文章。这篇wordpress教程里，我们就向大家介绍一下具体的实现方法。

我们先来了解一下wordpress内部提供的函数来判断某个页面的类别：

Crayon-5c891ce15dce2788634804" 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">

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

Crayon-plain-wrap">

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-5c891ce15dce2788634804-1">1

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dce2788634804-2">2

Crayon-num" data-line="Crayon-5c891ce15dce2788634804-3">3

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dce2788634804-4">4

Crayon-num" data-line="Crayon-5c891ce15dce2788634804-5">5

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-5c891ce15dce2788634804-1">Crayon-e">is_homeCrayon-sy">(Crayon-sy">)

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dce2788634804-2">Crayon-e">is_pagedCrayon-sy">(Crayon-sy">)

Crayon-line" id="Crayon-5c891ce15dce2788634804-3">Crayon-e">is_singleCrayon-sy">(Crayon-sy">)

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dce2788634804-4">Crayon-e">is_categoryCrayon-sy">(Crayon-sy">)

Crayon-line" id="Crayon-5c891ce15dce2788634804-5">Crayon-e">is_tagCrayon-sy">(Crayon-sy">)

上面的函数依次判断是否是首页、是否是分页显示、是否是文章页、是否是分类目录页、是否是标签页。wordpress中提供了各种钩子（Hooks ），通过这些钩子我们可以修改 wordpress中的一些内部行为。在查询的时候可以通过 posts_per_page 设置每页显示的文章数，如下：

Crayon-5c891ce15dcea198573518" 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">

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

Crayon-plain-wrap">

 1
    'posts_per_page' => 10
);
query_posts($args);

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-5c891ce15dcea198573518-1">1

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcea198573518-2">2

Crayon-num" data-line="Crayon-5c891ce15dcea198573518-3">3

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcea198573518-4">4

Crayon-num" data-line="Crayon-5c891ce15dcea198573518-5">5

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-5c891ce15dcea198573518-1">Crayon-sy">$Crayon-v">argsCrayon-h"> Crayon-o">=Crayon-h"> Crayon-t">arrayCrayon-sy">(

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcea198573518-2">Crayon-h">Crayon-s">'caller_get_posts'Crayon-h"> Crayon-o">=Crayon-h"> Crayon-cn">1

Crayon-line" id="Crayon-5c891ce15dcea198573518-3">Crayon-h">Crayon-s">'posts_per_page'Crayon-h"> Crayon-o">=Crayon-h"> Crayon-cn">10

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcea198573518-4">Crayon-sy">)Crayon-sy">;

Crayon-line" id="Crayon-5c891ce15dcea198573518-5">Crayon-e">query_postsCrayon-sy">(Crayon-sy">$Crayon-v">argsCrayon-sy">)Crayon-sy">;

上面的代码片段表示我们查询的时候需要每页最多显示10篇文章。我们可以通过重写 pre_get_posts 钩子来自定义不同归档页面每页显示的文章数量。如果我们想在首页每页最多显示10篇文章，分类页每页最多显示20篇文章，标签页每页最多显示30篇文章。切换到主题目录，打开functions.PHP 文件，加入以下代码：

Crayon-5c891ce15dcec944188119" 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">

set('posts_per_page',10);
    }
    if (is_category()) {
        $query->set('posts_per_page',20);
    }
    if (is_tag()) {
        $query->set('posts_per_page',30);
    } //endif
} //function
 
add_action('pre_get_posts','wp_posts_per_page');

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-5c891ce15dcec944188119-1">1

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcec944188119-2">2

Crayon-num" data-line="Crayon-5c891ce15dcec944188119-3">3

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcec944188119-4">4

Crayon-num" data-line="Crayon-5c891ce15dcec944188119-5">5

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcec944188119-6">6

Crayon-num" data-line="Crayon-5c891ce15dcec944188119-7">7

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcec944188119-8">8

Crayon-num" data-line="Crayon-5c891ce15dcec944188119-9">9

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcec944188119-10">10

Crayon-num" data-line="Crayon-5c891ce15dcec944188119-11">11

Crayon-num Crayon-striped-num" data-line="Crayon-5c891ce15dcec944188119-12">12

Crayon-num" data-line="Crayon-5c891ce15dcec944188119-13">13

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-5c891ce15dcec944188119-1">Crayon-t">functionCrayon-h"> Crayon-e">wp_posts_per_pageCrayon-sy">(Crayon-v">$queryCrayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcec944188119-2">Crayon-h">Crayon-st">ifCrayon-h"> Crayon-sy">(Crayon-e">is_homeCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line" id="Crayon-5c891ce15dcec944188119-3">Crayon-h">Crayon-v">$queryCrayon-e">setCrayon-sy">(Crayon-s">'posts_per_page'Crayon-sy">,Crayon-h"> Crayon-cn">10Crayon-sy">)Crayon-sy">;

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcec944188119-4">Crayon-h">Crayon-sy">}

Crayon-line" id="Crayon-5c891ce15dcec944188119-5">Crayon-h">Crayon-st">ifCrayon-h"> Crayon-sy">(Crayon-e">is_categoryCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcec944188119-6">Crayon-h">Crayon-v">$queryCrayon-e">setCrayon-sy">(Crayon-s">'posts_per_page'Crayon-sy">,Crayon-h"> Crayon-cn">20Crayon-sy">)Crayon-sy">;

Crayon-line" id="Crayon-5c891ce15dcec944188119-7">Crayon-h">Crayon-sy">}

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcec944188119-8">Crayon-h">Crayon-st">ifCrayon-h"> Crayon-sy">(Crayon-e">is_tagCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{

Crayon-line" id="Crayon-5c891ce15dcec944188119-9">Crayon-h">Crayon-v">$queryCrayon-e">setCrayon-sy">(Crayon-s">'posts_per_page'Crayon-sy">,Crayon-h"> Crayon-cn">30Crayon-sy">)Crayon-sy">;

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcec944188119-10">Crayon-h">Crayon-sy">}Crayon-h"> Crayon-c">//endif

Crayon-line" id="Crayon-5c891ce15dcec944188119-11">Crayon-sy">}Crayon-h"> Crayon-c">//function

Crayon-line Crayon-striped-line" id="Crayon-5c891ce15dcec944188119-12">Crayon-h">

Crayon-line" id="Crayon-5c891ce15dcec944188119-13">Crayon-e">add_actionCrayon-sy">(Crayon-s">'pre_get_posts'Crayon-sy">,Crayon-h"> Crayon-s">'wp_posts_per_page'Crayon-sy">)Crayon-sy">;

归档归档每页显示条数

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