Php 从开始到结束之间追加字符串

我要将字符串转换为wordpress中的guid

$str = http://captoons2.se7enmarketing.com/wp-content/uploads/2014/06/eden-apple.jpg 

试试这个

$str = http://captoons2.se7enmarketing.com/wp-content/uploads/2014/06/eden-apple-180x68.jpg 

---

这里有一个

尺码来自哪里？

<?php

$str = 'http://captoons2.se7enmarketing.com/wp-content/uploads/2014/06/eden-apple.jpg';
$names = pathInfo($str);
echo $names['dirname'].'/'.$names['filename'].'-'.'180x60'.'.'.$names['extension'];
//Prints => http://captoons2.se7enmarketing.com/wp-content/uploads/2014/06/eden-apple-180x60.jpg

?>