how can I validate youtube channel URL using REGEX ? I found this pattern but it doesn’t work properly Can anyone help me ? Answer Your problem is the extra pipe after user/ Here is the corrected regex: The reason this is a problem is because it make (channel|user) optional. A better way to write this r…
Tag: regex
Remove/Redirect index.php from url to prevent duplicate urls
Please read the question carefully before marking as duplicate. We all know, that using in .htaccess: RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^ index.php […
Regex get all numbers before colon
I have the folling string: I want to get all numbers before the colon and return an array with them. So for the given string i would get the following: Answer You can use this lookahead based regex in preg_match_all: Code: RegEx Demo
I can’t get preg_match to test if the entire string matches the regex
I’m using this regular expression to test if a username is valid: [A-Za-z0-9 _]{3,12} when I test it for matches in a text editor with the string test’ing, it highlights ‘test’ and ‘ing’, but when I use the following code in PHP: if(!preg_match(‘/[A-Za-z0-9 _]{3,12}/&…
Using getlementbyclass name or getlementbytag to scrape data from html content
Here I have taken source code snipper from webpage : http://www.yelp.com/biz/franchino-san-francisco?start=80. I want to scrape date, review, rate for each block on the page. @: http://ideone.com/fork/Yfw2re I am not much familiar with DOM element, I appreciate if someone can correct this Here is the code : A…
replace multiple spaces in a string with a single space
I have a file with has several spaces among the words at some point. I need to clean the file and replace existing multi-spaced sequences with one space only. I have written the following statement which does not work at all, and it seems I’m making a big mistake. My file is very simple. Here is a part …
Change the src part of an img tag
I’ve got a string containing html code, and I want to change to everytime it occurs in the string. I really don’t want to use …
Greater than and less than symbol in regular expressions
I am new to regular expressions, and I am just tired by really studying all of the regex charatcer and all. I need to know what is the purpose of greater than symbol in regex for eg: Please tell me the use of greater than symbo and less than symbol in regex. Answer The greater than symbol simply matches the
500 Internal Server Error when trying to use ErrorDocument to handle request
I have this .htaccess file: However, when I go to localhost/example.php, it returns a 500 Internal Server Error. Any help please? Thanks. EDIT: The full error message that comes up is: Answer You’re most likely getting 500 due to looping error. Exclude 404.php from last rule as:
Warning: preg_replace(): Unknown modifier
I have the following error: Warning: preg_replace(): Unknown modifier ‘]’ in xxx.php on line 38 This is the code on line 38: How can I fix this problem? Answer Why the error occurs In PHP, a regular expression needs to be enclosed within a pair of delimiters. A delimiter can be any non-alphanumeri…