Home  >  Article  >  Backend Development  >  What Characters are Allowed in an Input Element\'s Name Attribute in PHP?

What Characters are Allowed in an Input Element\'s Name Attribute in PHP?

DDD
DDDOriginal
2024-11-01 18:06:30968browse

 What Characters are Allowed in an Input Element's Name Attribute in PHP?

Allowed Characters in Input Element's name Attribute

When dynamically generating elements using PHP, the characters used in the name attribute require careful consideration. The name attribute serves as a key to retrieve data from the submitted form. It should adhere to certain conventions to ensure successful data handling.

Required Character

  • The name must start with a letter. No other characters are allowed at the beginning.

Allowed Characters

  • After the first letter, only letters, numbers, and underscore (_) are permitted. Square brackets, parentheses, and spaces are not allowed as per HTML specifications.

Behavior of Prohibited Characters

In practice, some browsers may allow certain prohibited characters to be submitted despite being invalid according to the HTML standard. However, these characters are not guaranteed to be processed correctly. For example:

  • White-space characters (e.g., spaces, tabs) are trimmed, while inner white-space characters are replaced with underscores (_).
  • The character "." (period) is replaced with an underscore (_).

Therefore, it is advisable to follow the standard HTML specifications and avoid using prohibited characters in the name attribute to ensure consistent data handling.

The above is the detailed content of What Characters are Allowed in an Input Element\'s Name Attribute in PHP?. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn