During the template development process of AnQiCMS, we often need to perform dynamic data analysis or display on the page content, such as counting the frequency of a keyword's appearance, or checking the number of specific elements in a list. At this time,countFilter has become a very practical tool.It can help you quickly and efficiently calculate the number of times a specific keyword appears in a string or array, providing the possibility for flexible presentation of templates.

countFilter: Precisely count your content

In short,countFilter is a powerful tool that can help us count the number of times a specific keyword appears in a string (a sequence of characters) or an array (a sequence of data items).This is of great value in content management.For example, you may need to check the density of a certain keyword in the article to optimize search engine rankings; or count the number of times a specific tag is referenced in the document list for content recommendation.countFilters can provide intuitive statistical results.

How to use in AnQiCMS templatecountFilter?

countThe syntax of the filter usage is very intuitive, following the general rules of AnQiCMS template engine:

{{ 要统计的变量 | count: "要查找的关键词" }}

Here,要统计的变量It can be a string containing text, or an array containing multiple data items (or sometimes called a slice).要查找的关键词Then it is the text you want to count the occurrences in the variable. It should be noted that,countThe filter is case-sensitive when matching.

1. Count the number of times a keyword appears in a string

When you need to calculate the frequency of a keyword in a piece of text,countthe filter can be directly applied to the string.

Example:Assuming we have a description of AnQiCMS, we want to count the number of times 'CMS' appears in it.

{% set contentText = "欢迎使用安企CMS（AnQiCMS），安企CMS 是一个高效的内容管理系统。" %}
<p>“CMS” 在这段文字中出现了：{{ contentText | count: "CMS" }} 次。</p>

The code will output:“CMS” 在这段文字中出现了：2 次。

2. Count the number of times a specific value appears in an array

countThe filter function is also applicable to arrays. When you have a data list and want to know how many times a specific value appears, this feature is particularly convenient.

Example:Suppose we obtain a list of keywords in some way and want to count the occurrences of 'AnQi CMS'. To split a string into an array by spaces, we can first usefieldsFilter.

{% set tagsString = "安企CMS 模板开发 安企CMS 功能强大 SEO优化" %}
{% set tagsArray = tagsString | fields %} {# 使用 fields 过滤器将字符串按空格拆分成数组 #}

<p>数组中 "安企CMS" 出现了：{{ tagsArray | count: "安企CMS" }} 次。</p>
<p>数组中 "功能" 出现了：{{ tagsArray | count: "功能" }} 次。</p>

The code will output:数组中 "安企CMS" 出现了：2 次。 数组中 "功能" 出现了：1 次。

It should be noted that:When performing statistics in the array,countThe filter will performExact matchThis means, if an element in the array is 'Content Management System', and you are looking for 'System',countThe filter will consider 'system' not to appear alone, so the count will be 0. Counting will only be performed when the array element is an exact match with the keyword you are searching for.

3. English

countThe filter is usually used in combination with other template logic to achieve more complex dynamic display.For example, you can assign the statistical results to a variable and then make a conditional judgment based on the value of the variable.

{% set articleBody = "安企CMS 不仅功能丰富，而且安企CMS 易于上手。我们推荐使用安企CMS。" %}
{% set anqiCmsMentions = articleBody | count: "安企CMS" %}

{% if anqiCmsMentions > 2 %}
  <p class="warning">注意：文章中 "安企CMS" 关键词出现了 {{ anqiCmsMentions }} 次，可能存在过度堆砌风险。</p>
{% elif anqiCmsMentions > 0 %}
  <p class="info">文章中 "安企CMS" 关键词出现了 {{ anqiCmsMentions }} 次，关键词使用恰当。</p>
{% else %}
  <p class="tip">文章中未提及 "安企CMS" 关键词。</p>
{% endif %}

这样的代码可以帮助您在后台管理或模板预览时，对内容质量进行初步的English评估。

实用场景与进阶思考

countThe application scenarios of filters are very extensive:

  • SEO Keyword Density Analysis:Quickly check the frequency of appearance of the core keywords in the article, assist in content optimization.
  • Content review:Count the occurrences of sensitive words, repeated phrases, or specific commercial terms.
  • Dynamic recommendations:Based on user behavior or page content, count related keywords to recommend more accurate content or products.
  • A/B Test:Compare the usage of specific elements in different versions of content.

By using flexibilitycountFilter, it allows AnQiCMS templates to be more dynamic and intelligent, enhancing the efficiency of website content operation and user experience.

Common Questions and Answers (FAQ)

1.countFilter why do I sometimes not get the result I want when counting the array?

This is usually becausecountWhat is the filter doing in the array?Exact matchFor example, if your array contains"安企CMS"and you try to count"CMS"，The result will be 0. Only when the array element matches the keyword you are looking for exactly (including case),countThe count will only be performed. If you need a more flexible substring matching, you can consider concatenating the array elements into a long string and then usingcountFilter statistics.

2.countFilter is case sensitive?

Yes,countFilter matches strings and arrayscase-sensitiveFor example,"AnQiCMS"and"anqicms"It would be considered as two different keywords. If your requirement is to count without distinguishing between uppercase and lowercase, you can applycountUse it before the filterlowerorupperThe filter will convert the text to lowercase or uppercase format.

3. How to count the occurrence of a substring in a string that is not an independent word?

If you want to count the number of times a substring appears in a large text, regardless of whether it is a standalone word, you can use the filter directly. For example,countthe filter."这是我的一个CMS系统，另一个CMS也很棒" | count: "CMS"It will return 2. If you need to count the occurrences ofindividual words, you can first usefieldsa filter to split the string into an array of words, and then use it on the arraycountFilter statistics.