Regular expression: Difference between revisions

Regular expression (edit)

551 bytes added , 20 September 2016

15,041

edits

@@ Line 470: / Line 470: @@
 <pre>
 [^\d|\n]
+</pre>
+=== 尋找 Hashtag ===
+* 因為連結包含 # 符號，所以需要事先處理。
+* PHP code<ref>[http://stackoverflow.com/questions/3060601/retrieve-all-hashtags-from-a-tweet-in-a-php-function regex - Retrieve all hashtags from a tweet in a PHP function - Stack Overflow]</ref>:
+<pre>
+preg_match_all("/(#[^\s|\-|,|\"|，|\[|\]|『|』|／|~|(|)|（|）|【|】|《|》|－|「|」|！|!|、|？|：|…|:|#|\.|．|。|?]+)/ui", $string, $matches);
+</pre>
+* 還需要處理以下狀況
+<pre>
+illegal
+#12345
+#___
+#_
+#__123
+legal
+#1_abc
+#_abc
 </pre>