इस
प्रयास करें
अद्यतन 1
(?im)^([a-z_](?:[\.\-]\w|\w)+(?![\.\-]))$
अद्यतन 2
(?im)^([a-z_](?:\.\-\w|\-\.\w|\-\w|\.\w|\w)+)$
स्पष्टीकरण
<!--
(?im)^([a-z_](?:\.\-\w|\-\.\w|\-\w|\.\w|\w)+)$
Match the remainder of the regex with the options: case insensitive (i);^and $ match at line breaks (m) «(?im)»
Assert position at the beginning of a line (at beginning of the string or after a line break character) «^»
Match the regular expression below and capture its match into backreference number 1 «([a-z_](?:\.\-\w|\-\.\w|\-\w|\.\w|\w)+)»
Match a single character present in the list below «[a-z_]»
A character in the range between “a” and “z” «a-z»
The character “_” «_»
Match the regular expression below «(?:\.\-\w|\-\.\w|\-\w|\.\w|\w)+»
Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match either the regular expression below (attempting the next alternative only if this one fails) «\.\-\w»
Match the character “.” literally «\.»
Match the character “-” literally «\-»
Match a single character that is a “word character” (letters, digits, and underscores) «\w»
Or match regular expression number 2 below (attempting the next alternative only if this one fails) «\-\.\w»
Match the character “-” literally «\-»
Match the character “.” literally «\.»
Match a single character that is a “word character” (letters, digits, and underscores) «\w»
Or match regular expression number 3 below (attempting the next alternative only if this one fails) «\-\w»
Match the character “-” literally «\-»
Match a single character that is a “word character” (letters, digits, and underscores) «\w»
Or match regular expression number 4 below (attempting the next alternative only if this one fails) «\.\w»
Match the character “.” literally «\.»
Match a single character that is a “word character” (letters, digits, and underscores) «\w»
Or match regular expression number 5 below (the entire group fails if this one fails to match) «\w»
Match a single character that is a “word character” (letters, digits, and underscores) «\w»
Assert position at the end of a line (at the end of the string or before a line break character) «$»
-->
और आप इसे here का परीक्षण कर सकते हैं।
हो जाता है सवाल क्या है? –
उदाहरणों को संपादित किया, ताकि यह अधिक समझ में आता है। क्या इसे और स्पष्टीकरण की आवश्यकता है। कृपया मुझे बताएं, मुझे आगे स्पष्टीकरण देने में खुशी होगी। – banskt
'pro..ductname' मिलान क्यों नहीं होना चाहिए? डॉट्स बीच में हैं? –