前端之家收集整理的这篇文章主要介绍了
WordPress教程：超过一定时间的老文章顶部显示自定义信息，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
站长朋友们在wordpress插件库查找插件时，偶尔会看到提示说插件已经超过 2 年没有更新。如果我们想在自己的wordpress老文章顶部显示类似的提示信息，比如超过 1 年没有更新的文章，就提示某些信息，如下图所示：
这篇wordpress教程里，我们就向大家介绍一下实现的方法。切换到主题目录，打开 functions.PHP 文件，加入以下代码：
Crayon-5c891cbd7fca2229907978" class="
Crayon-
Syntax Crayon-theme-classic
Crayon-font-monaco
Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mou
SEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;">
Crayon-toolbar" data-settings=" mou
SEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">
Crayon-title">functions.PHPCrayon-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-5c891cbd7fca2229907978-1">1 Crayon-num Crayon-striped-num" data-line=" Crayon-5c891cbd7fca2229907978-2">2 Crayon-num" data-line=" Crayon-5c891cbd7fca2229907978-3">3 Crayon-num Crayon-striped-num" data-line=" Crayon-5c891cbd7fca2229907978-4">4 Crayon-num" data-line=" Crayon-5c891cbd7fca2229907978-5">5 Crayon-num Crayon-striped-num" data-line=" Crayon-5c891cbd7fca2229907978-6">6 Crayon-num" data-line=" Crayon-5c891cbd7fca2229907978-7">7 Crayon-num Crayon-striped-num" data-line=" Crayon-5c891cbd7fca2229907978-8">8 Crayon-num" data-line=" Crayon-5c891cbd7fca2229907978-9">9 Crayon-num Crayon-striped-num" data-line=" Crayon-5c891cbd7fca2229907978-10">10 Crayon-num" data-line=" Crayon-5c891cbd7fca2229907978-11">11 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-5c891cbd7fca2229907978-1"> Crayon-c">//超过一定时间的老文章顶部显示自定义信息Crayon-line Crayon-striped-line" id=" Crayon-5c891cbd7fca2229907978-2"> Crayon-t">functionCrayon-h"> Crayon-e">old_content_messageCrayon-sy">(Crayon-v">$contentCrayon-sy">)Crayon-h"> Crayon-sy">{Crayon-line" id=" Crayon-5c891cbd7fca2229907978-3"> Crayon-h"> Crayon-v">$modifiedCrayon-h"> Crayon-o">=Crayon-h"> Crayon-e">get_the_modified_timeCrayon-sy">(Crayon-s">'U'Crayon-sy">)Crayon-sy">;Crayon-h"> Crayon-line Crayon-striped-line" id=" Crayon-5c891cbd7fca2229907978-4"> Crayon-h"> Crayon-v">$currentCrayon-h"> Crayon-o">=Crayon-h"> Crayon-e">current_timeCrayon-sy">(Crayon-s">'timestamp'Crayon-sy">)Crayon-sy">;Crayon-line" id=" Crayon-5c891cbd7fca2229907978-5"> Crayon-h"> Crayon-v">$diffTimeCrayon-h"> Crayon-o">=Crayon-h"> Crayon-sy">(Crayon-v">$currentCrayon-h"> Crayon-o">-Crayon-h"> Crayon-v">$modifiedCrayon-sy">)Crayon-h"> Crayon-o">/Crayon-h"> Crayon-sy">(Crayon-cn">60Crayon-o">*Crayon-cn">60Crayon-o">*Crayon-cn">24Crayon-sy">)Crayon-sy">;Crayon-h"> Crayon-line Crayon-striped-line" id=" Crayon-5c891cbd7fca2229907978-6"> Crayon-h"> Crayon-st">ifCrayon-sy">(Crayon-v">$diffTimeCrayon-h"> Crayon-h"> Crayon-cn">365Crayon-h"> Crayon-sy">)Crayon-sy">{Crayon-line" id=" Crayon-5c891cbd7fca2229907978-7"> Crayon-h"> Crayon-v">$contentCrayon-h"> Crayon-o">=Crayon-h"> Crayon-s">'Crayon-sy">.Crayon-e">get_the_modified_timeCrayon-sy">(Crayon-s">'Y年n月j日'Crayon-sy">)Crayon-sy">.Crayon-s">'，已超过 1 年没有更新，如果文章内容失效，请反馈给我们，谢谢！ 'Crayon-sy">.Crayon-v">$contentCrayon-sy">;Crayon-line Crayon-striped-line" id=" Crayon-5c891cbd7fca2229907978-8"> Crayon-h"> Crayon-sy">}Crayon-line" id=" Crayon-5c891cbd7fca2229907978-9"> Crayon-h"> Crayon-k ">returnCrayon-h"> Crayon-v">$contentCrayon-sy">;Crayon-line Crayon-striped-line" id=" Crayon-5c891cbd7fca2229907978-10"> Crayon-sy">}Crayon-line" id=" Crayon-5c891cbd7fca2229907978-11"> Crayon-e">add_filterCrayon-sy">(Crayon-h"> Crayon-s">'the_content'Crayon-sy">,Crayon-h"> Crayon-s">'old_content_message'Crayon-h"> Crayon-sy">)Crayon-sy">;以上代码的第 3 行使用了 get_the_modified_time() 函数来获取该篇文章的最后修订时间，如果您的文章在发布后进行过修改，比如修改标签、内容等都会更新时间。第 6 行的 365 是天数，第 7 行 是自定义信息，请根据您自己的需要进行修改。 如果您只想在特定的分类显示提示，比如只在 ID 为 10 的分类的文章显示提示信息，可以将第 6 行代码修改为： Crayon-5c891cbd7fcac521260527" class=" Crayon- Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mou SEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;"> Crayon-toolbar" data-settings=" mou SEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;"> Crayon-title">functions.PHPCrayon-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-5c891cbd7fcac521260527-1">1 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-5c891cbd7fcac521260527-1"> Crayon-st">ifCrayon-sy">(Crayon-v">$diffTimeCrayon-h"> Crayon-h"> Crayon-cn">365Crayon-h"> Crayon-o">&&Crayon-h"> Crayon-e">in_categoryCrayon-sy">(Crayon-cn">10Crayon-sy">)Crayon-h"> Crayon-sy">)Crayon-sy">{如果是多个分类，比如在 ID 为 10、11、12的分类文章显示提示信息，可以使用数组形式： Crayon-5c891cbd7fcae052465059" class=" Crayon- Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mou SEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;"> Crayon-toolbar" data-settings=" mou SEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;"> Crayon-title">functions.PHPCrayon-tools" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;"> Crayon-button Crayon-nums-button" title="Toggle Line Numbers"> Crayon-button-icon"> Crayon-button Crayon-plain-button" title="Toggle Plain Code"> Crayon-button-icon"> Crayon-button Crayon-wrap-button" title="Toggle Line Wrap"> Crayon-button-icon"> Crayon-button Crayon-expand-button" title="Expand Code"> Crayon-button-icon"> Crayon-button Crayon-copy-button" title="Copy"> Crayon-button-icon"> Crayon-button Crayon-popup-button" title="Open Code In New Window"> Crayon-button-icon"> Crayon-info" style="min-height: 16.8px !important; line-height: 16.8px !important;"> Crayon-plain-wrap"> Crayon-main" style=""> Crayon-table">Crayon-row">Crayon-nums " data-settings="show">Crayon-nums-content" style="font-size: 12px !important; line-height: 15px !important;"> Crayon-num" data-line=" Crayon-5c891cbd7fcae052465059-1">1 Crayon-pre" style="font-size: 12px !important; line-height: 15px !important; -moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4;"> Crayon-line" id=" Crayon-5c891cbd7fcae052465059-1"> Crayon-st">ifCrayon-sy">(Crayon-v">$diffTimeCrayon-h"> Crayon-h"> Crayon-cn">365Crayon-h"> Crayon-o">&&Crayon-h"> Crayon-e">in_categoryCrayon-sy">(Crayon-t">arrayCrayon-sy">(Crayon-cn">10Crayon-sy">,Crayon-cn">11Crayon-sy">,Crayon-cn">12Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">)Crayon-sy">{如果要排除某些分类，比如在 ID 为 10、11、12 以外的分类文章显示提示信息，可在 in_category 前添加“!”： Crayon-5c891cbd7fcb0477788446" class=" Crayon- Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mou SEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;"> Crayon-toolbar" data-settings=" mou SEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;"> Crayon-title">functions.PHPCrayon-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-5c891cbd7fcb0477788446-1">1 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-5c891cbd7fcb0477788446-1"> Crayon-st">ifCrayon-sy">(Crayon-v">$diffTimeCrayon-h"> Crayon-h"> Crayon-cn">365Crayon-h"> Crayon-o">&&Crayon-h"> Crayon-o">!Crayon-e">in_categoryCrayon-sy">(Crayon-t">arrayCrayon-sy">(Crayon-cn">10Crayon-sy">,Crayon-cn">12Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">)Crayon-sy">{然后在css文件添加如下样式，可以达到配图效果： Crayon-5c891cbd7fcb2418941276" class=" Crayon- Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mou SEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;"> Crayon-toolbar" data-settings=" mou SEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;"> Crayon-title">styles.cssCrayon-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-5c891cbd7fcb2418941276-1">1 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-5c891cbd7fcb2418941276-1"> Crayon-k ">.old-messageCrayon-sy">{Crayon-e ">paddingCrayon-sy">:Crayon-i ">10pxCrayon-sy">;Crayon-e ">colorCrayon-sy">:Crayon-h"> Crayon-i ">#DB7C22Crayon-sy">;Crayon-e ">font-sizeCrayon-sy">:Crayon-h"> Crayon-i ">14pxCrayon-sy">;Crayon-e ">backgroundCrayon-sy">:Crayon-h"> Crayon-i ">#FFFCEFCrayon-sy">;Crayon-e ">borderCrayon-sy">:Crayon-h"> Crayon-i ">solidCrayon-h"> Crayon-i ">1pxCrayon-h"> Crayon-i ">#FFBB76Crayon-sy">;Crayon-e ">border-radiusCrayon-sy">:Crayon-h"> Crayon-i ">2pxCrayon-sy">;Crayon-e ">Box-shadowCrayon-sy">:Crayon-h"> Crayon-i ">0Crayon-h"> Crayon-i ">0Crayon-h"> Crayon-i ">3pxCrayon-h"> Crayon-i ">#dddCrayon-sy">;Crayon-sy">}需要此功能的朋友可以按照上面的方法进行操作。 原文链接：https://www.f2er.com/wordpress/238367.html
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