PHP rtrim 和 ltrim 的修剪比预期的要多

Question

我想从我网站的页面中删除 Search -。下面是我的代码示例:

输入:

$search = "Search - echelon";
$trim = "Search - ";

$result = ltrim($search,$trim);


echo $result;

输出:

lon

期望输出:

梯队

我该怎么做，为什么 ltrim 在我上面的例子中修剪得更多？谢谢!

Answer 1

RTM .第二个参数被视为一组要修剪的字符。

在这种情况下:

S - in the list, trim it
e - in the list, trim it
a - in the list, trim it
r - in the list, trim it
c - in the list, trim it
h - in the list, trim it
_ - (space) in the list, trim it
- - in the list, trim it
_ - (space) in the list, trim it
e - in the list, trim it
c - in the list, trim it
h - in the list, trim it
e - in the list, trim it
l - NOT in the list, stop!

lon is left

你是这个意思吗？

$result = substr($search,strlen($trim));