PHP正则表达式“未知修饰符p"
// If url matches regex
$regex = "/^(/upload/temporary/)[0-9]{4}_[0-9]{2}_[0-9]{2}_[A-Za-z0-9._ /-]+.[A-z]{2,4}$/";
if (preg_match($regex, $this->value)) {
$this->valid();
}
错误信息
Warning: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Unknown modifier 'p' in C:Apachewwwprofiletwistlibphpformurl.php on line 41
Call Stack
# Time Memory Function Location
1 0.0079 440016 {main}( ) ..
ew.php:0
2 0.0964 667832 form->validate( ) ..
ew.php:60
3 0.0968 668248 form_URL->validateUploadURL( ) ..form.php:372
4 0.0969 668400 preg_match ( ) ..url.php:41
Variables in local scope (#3)
$regex =
string '/^(/upload/temporary/)[0-9]{4}_[0-9]{2}_[0-9]{2}_[A-Za-z0-9._ /-]+.[A-z]{2,4}$/' (length=79)
问题
如何修复正则表达式,以免发生此未知修饰符"错误?
Question
How do I fix the regex for this "unknown modifier" error to not occur?
最终,我想要一个确保文本输入匹配的正则表达式:
ultimately, I would like a regex that makes sure the text input matches:
"/upload/temporary/####_##_##_[A-z0-9 _-]+ "." [a-z]{3}
这是一个文件名目标.开头不会改变,最后一部分可以是随机散列,后跟任意扩展名.在正则表达式之后进行进一步的处理,但这是第一次测试.
This is a filename target. The beginning does not change and the last part can be a random hash followed by an arbitrary extension. Further processing is done after the regex but this is the first test.
谢谢!
推荐答案
在正则表达式字符串中,您必须对分隔符进行转义.或者更好:使用一个没有出现在正则表达式中的字符作为分隔符:
In a regex string you have to escape your delimiters. Or better: use a character which doesn't appear in the regex itself as delimiter:
其他分隔符(推荐):
$regex = "#^(/upload/temporary/)[0-9]{4}_[0-9]{2}_[0-9]{2}_[A-Za-z0-9._ /-]+.[A-z]{2,4}$#";
转义分隔符:
$regex = "/^(/upload/temporary/)[0-9]{4}_[0-9]{2}_[0-9]{2}_[A-Za-z0-9._ /-]+.[A-z]{2,4}$/";
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