删除字符串的一部分,但仅当它位于字符串末尾时
我需要删除字符串的子字符串,但前提是它位于字符串的末尾.
I need to remove a substring of a string, but only when it is at the END of the string.
例如,删除以下字符串末尾的 'string' :
for example, removing 'string' at the end of the following strings :
"this is a test string" -> "this is a test "
"this string is a test string" - > "this string is a test "
"this string is a test" -> "this string is a test"
有什么想法吗?可能是某种 preg_replace,但如何??
Any idea's ? Probably some kind of preg_replace, but how??
推荐答案
您会注意到 $
字符的使用,它表示字符串的结尾:
You'll note the use of the $
character, which denotes the end of a string:
$new_str = preg_replace('/string$/', '', $str);
如果字符串是用户提供的变量,最好先通过 preg_quote
运行它:
If the string is a user supplied variable, it is a good idea to run it through preg_quote
first:
$remove = $_GET['remove']; // or whatever the case may be
$new_str = preg_replace('/'. preg_quote($remove, '/') . '$/', '', $str);
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