PHP 正则表达式：未找到结束分隔符 '^'
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4634993/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
PHP regular expressions: No ending delimiter '^' found in
提问by fingerman
I've been having some trouble with regular expressions.
我在使用正则表达式时遇到了一些麻烦。
This is my code
这是我的代码
$pattern = "^([0-9]+)$";
if (preg_match($pattern, $input))
echo "yes";
else
echo "nope";
I run it and get:
我运行它并得到：
Warning: preg_match() [function.preg-match]: No ending delimiter '^' found in
警告：preg_match() [function.preg-match]：在
回答by Kobi
PHP regex strings need delimiters. Try:
PHP 正则表达式字符串需要分隔符。尝试：
$numpattern="/^([0-9]+)$/";
Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the regex to /^\d+$/.
另外，请注意您使用的是小写的 o，而不是零。另外，如果只是验证，则不需要捕获组，可以将正则表达式简化为/^\d+$/.
Example: http://ideone.com/Ec3zh
See also: PHP - Delimiters
另请参阅：PHP - 分隔符
回答by David Powers
Your regex pattern needs to be in delimiters:
您的正则表达式模式需要在分隔符中：
$numpattern="/^([0-9]+)$/";
回答by Danon
You can use T-Regx library, that doesn't need delimiters
您可以使用不需要分隔符的T-Regx 库
pattern('^([0-9]+)$')->match($input);
