How to validate custom fields in custom post type?
I wrote a plugin that creates a custom post type with custom fields. To prevent users from entering incorrect information, how can I … Read more
validation
Sanitize and data validation with apply_filters() function
Should we sanitize and validate the apply_filters() like the examples below? absint( apply_filters( ‘slug_excerpt_length’, 35 ) ); wp_kses_post( apply_filters( ‘slug_excerpt_more’, ‘…’ ) ); … Read more
How to allow only numeric (0-9) in HTML inputbox using jQuery?
I am creating a web page where I have an input text field in which I want to allow only numeric characters like … Read more
How to validate phone numbers using regex
I’m trying to put together a comprehensive regex to validate phone numbers. Ideally it would handle international formats, but it must handle US … Read more
What is the maximum length of a valid email address?
What is the maximum length of a valid email address? Is it defined by any standard? 8 s 8 An email address must … Read more
How does the SQL injection from the “Bobby Tables” XKCD comic work?
Just looking at: (Source: https://xkcd.com/327/) What does this SQL do: Robert’); DROP TABLE STUDENTS; — I know both ‘ and — are for … Read more
How to check if a string is a valid URL
WordPress provides a helpful function called is_email() which checks if a given email address is valid. Is there a similar function available to … Read more
don’t publish custom post type post if a meta data field isn’t valid
I have a custom post type (CPT) called event. I have a meta box for the type with several fields. I would like … Read more
A potentially dangerous Request.Form value was detected from the client
Every time a user posts something containing < or > in a page in my web application, I get this exception thrown. I … Read more
How can I check if a string is a valid number?
I’m hoping there’s something in the same conceptual space as the old VB6 IsNumeric() function? 4 44