删除所有html标签和限制字母php(delete all html tag and limit letters php)

 我已经制作了这个PHP脚本： 
 
//save the data into a variable
$testo = $news['testo'];

//delete all tag html
$testo = strip_tags($testo);

?>
<?php print "<p>".substr($testo,0,400)."...</p>"; ?>
 
 首先我拿变量，然后删除所有标签并将字母限制为400。 
 
 但是有一个问题，这些字母与文章和文章不同。 喜欢：393封信，378封信，ecc。 
 
 我该怎么解决？ 我希望每篇文章都有相同数量的字母。 

i have made this php script:
 
//save the data into a variable
$testo = $news['testo'];

//delete all tag html
$testo = strip_tags($testo);

?>
<?php print "<p>".substr($testo,0,400)."...</p>"; ?>
 
First i take the variable and after i delete all tag and limit the letters to 400.
 
But there is a problem, the letters are different from article and article. Like: 393 letter, 378 letter, ecc.
 
how can I fix it ? I want the same number of letter for every article.

原文：https://stackoverflow.com/questions/35510674