如何限制php DOM中的字符串输出长度

Question

I have this code for parsing RSS to HTML.

<?php 
       $channel_desc = $channel->getElementsByTagName('description')
                        ->item(0)
                        ->childNodes
                        ->item(0)
                        ->nodeValue;

I want to get only 150 characters from first description. How can I limit the length output?

Answer 1

You can use the "substr" function of php to extract the first 150 characters of any given string.

$channel_desc = substr($channel->getElementsByTagName('description') ->item(0)->childNodes->item(0)->nodeValue,0,150);

Refer: http://php.net/manual/en/function.substr.php