query: Why does this regular expression result in: "preg_match() ... No ending delimiter '^' "?
positive_passages.docid: 26682
positive_passages.text: PHP regular expressions: No ending delimiter '^' found in
negative_passages.docid: 38724
negative_passages.text: Preg_replace match on word boundery and not in link
negative_passages.docid: 101148
negative_passages.text: Regular expression to return text between parenthesis
negative_passages.docid: 14068
negative_passages.text: Regular Expressions: Is there an AND operator?
negative_passages.docid: 141606
negative_passages.text: How can I recognize an evil regex?
negative_passages.docid: 5725
negative_passages.text: Create preg_match for password validation allowing (!@#$%)
negative_passages.docid: 68031
negative_passages.text: PHP/REGEX: Get a string within parentheses
negative_passages.docid: 114438
negative_passages.text: Explanation of Lookaheads in This Regular Expression
negative_passages.docid: 94281
negative_passages.text: How can I grep for a string containing regex metacharacters like $ and '?
negative_passages.docid: 322
negative_passages.text: clear meaning of .* in regex
negative_passages.docid: 33209
negative_passages.text: Regex to match URL end-of-line or "/" character
negative_passages.docid: 61451
negative_passages.text: Interesting test of Javascript RegExp
negative_passages.docid: 2559
negative_passages.text: Is there a regular expression to detect a valid regular expression?
negative_passages.docid: 95874
negative_passages.text: RegExp word boundary with special characters (.) javascript
negative_passages.docid: 35299
negative_passages.text: preg_match special characters
negative_passages.docid: 150965
negative_passages.text: RegEx expression not allowing only spaces?
negative_passages.docid: 97125
negative_passages.text: When does preg_match(): Unknown modifier error occur?