计算变量内容里有多少个字符。 <table border="1"> <colgroup> <col align="center"> <col align="center"> <col align="center"> <col align="center"> <col> </colgroup> <thead><tr> <th align="center">参数顺序</th> <th align="center">类型</th> <th align="center">必选参数</th> <th align="center">默认值</th> <th>说明</th> </tr></thead> <tbody><tr> <td align="center">1</td> <td align="center">boolean</td> <td align="center">No</td> <td align="center"><code class="constant">FALSE</code></td> <td> 计算总数时是否包括空格字符。</td> </tr></tbody> </table> articleTitle：`Cold Wave Linked to Temperatures.` ``` _{$articleTitle}_ _{$articleTitle|count_characters}_ _{$articleTitle|count_characters:true}_ ``` 输出： ``` Cold Wave Linked to Temperatures. 29 33 ```