validation Archives - Page 11 of 12

WordPress

IT Nursery

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 ...

April 18, 2022
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WordPress

IT Nursery

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', '…' ) ); ...

April 17, 2022
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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 ...

April 16, 2022
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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 ...

April 15, 2022
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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 ...

April 14, 2022
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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 ...

April 14, 2022
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WordPress

IT Nursery

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 ...

April 13, 2022
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WordPress

IT Nursery

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 ...

April 13, 2022
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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 ...

April 12, 2022
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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

April 11, 2022
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