I need to validate just one field (called ‘Instance’) to accept lowercase ASCII letters and numbers only, the first character also has to be a letter not a number. It will accept uppercase characters but we will need it to lowercase them on input. So if someone uses the instance name McDonalds it will be lowercased to mcdonalds (not just with CSS). Spaces are not allowed either.
Is this possible with CF7? If so please explain how.
I’ve already tried this custom validation method but even with the preset custom validation in the file it was just displaying the field shortcode rather than the field itself.
Thanks
Related Posts:
- What’s the net::ERR_HTTP2_PROTOCOL_ERROR about?
- How can I find my php.ini on wordpress?
- $wpdb->update or $wpdb->insert results in slashes being added in front of quotes
- Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 71 bytes)
- WordPress Error : Upload folder is not writable. Export and file upload features will not be functional
- WordPress child theme style.css not working
- Child theme css not overriding parent
- Prioritize Visible Content WordPress
- Get user role by ID WordPress
- do_shortcode not working
- WooCommerce action hooks and overriding templates
- XAMPP, using port:81, cannot run localhost:81/mywebsite
- WordPress query single post by slug
- How to integrate WordPress with Angular 8 for website?
- Create a folder if it doesn’t already exist
- A non well formed numeric value encountered
- How to remove index.php from WordPress site URL
- CSS background images in WordPress
- WordPress visual composer not loading
- validate textfield contents in wordpress simple job board plugin
- wordpress menu dropdown item not showing after first dropdown
- WordPress get_template_directory_uri() not returning https and only return http
- Contact form – problem with displaying message about sent mail
- Replace ' and similar html codes with their correspondent character?
- Google Calendar API event update always return 404 “not found” error
- How to prevent the “Confirm Form Resubmission” dialog?
- navigate back with PHP form submission
- How to set 777 permission on a particular folder? [closed]
- How do I make a redirect in PHP?
- List of All Locales and Their Short Codes?
- Difference between “as $key => $value” and “as $value” in PHP foreach
- How do I get a YouTube video thumbnail from the YouTube API?
- What is a slug?
- Visual list of all installed fonts with respective pangram phrase?
- How to avoid Request Entity Too Large 413 error
- How to log in to phpMyAdmin with WAMP, what is the username and password?
- Array to String PHP?
- What’s the net::ERR_HTTP2_PROTOCOL_ERROR about?
- Should I use mysqli_real_escape string() or mysql_real_escape_string() for form data?
- count() parameter must be an array or an object that implements countable in laravel
- regex match any whitespace
- How to fix “Headers already sent” error in PHP
- currently unable to handle this request HTTP ERROR 500
- PHP page redirect
- Whoops, looks like something went wrong. Laravel 5.0
- PHP “or” Syntax
- Fatal error: Call to undefined function mysql_connect()
- How to fix “Headers already sent” error in PHP
- “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
- What are namespaces?
- Get the full URL in PHP
- PDOException SQLSTATE[HY000] [2002] No such file or directory
- http://localhost:80 is not working on running Apache server through UniServer ZeroXIII
- PDOException SQLSTATE[HY000] [2002] No such file or directory
- Mysql query- How to use contains?
- How do I get PHP errors to display?
- S_SESSION variable (user role) not recognised
- What are the main differences between PHPExcel and PhpSpreadsheet?
- Is SAJAX dead? What to replace with?
- How do I resolve a HTTP 414 “Request URI too long” error?
- Get the full URL in PHP
- How do I check if a string contains a specific word?
- PDOException: SQLSTATE[HY000] [2002] No such file or directory
- xajax expanding list query
- How to force file download with PHP
- How do I get a file extension in PHP?
- How to Set Category Page as Home Page in Prestashop
- Get the full URL in PHP
- Data source name not found, and no default driver specified
- mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given in
- Invalid column count in CSV input on line 1 Error
- Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, object given in
- How to copy a file from one directory to another using PHP?
- How to check if a string starts with a specified string?
- what does PHP die() return
- Invalid column count in CSV input on line 1 Error
- how to replace quotation marks with \”
- Getting an error when I visit http://localhost
- How do I redirect a page in jQuery?
- mcrypt is deprecated, what is the alternative?
- mysqli_real_connect(): (HY000/2002): No such file or directory
- Convert a PHP object to an associative array
- XAMPP Port 80 in use by “Unable to open process” with PID 4
- PHP + curl, HTTP POST sample code?
- PHP random string generator
- How to echo or print an array in PHP?
- Fatal error: Call to undefined function mysqli_connect()
- What are the differences in die() and exit() in PHP?
- How to parse a CSV file using PHP
- How to call a JavaScript function from PHP?
- Cannot use object of type stdClass as array?
- Is a new line = \n OR \r\n?
- What is difference between PHP cli and PHP cgi?
- Resize image in PHP
- Error 500: Premature end of script headers
- Cookies vs. sessions
- Expected status code 200 but received 500
- Regex to check for new line
- How to replace “if” statement with a ternary operator ( ? : )?
- PDO with INSERT INTO through prepared statements