Home >Backend Development >PHP Tutorial >isset() Function in PHP
isset() Function in PHP
- WBOYOriginal
- 2024-08-29 12:49:291026browse
The isset() function of PHP usually checks whether variable is set/declared and it is different/other than the NULL. If the variable is unset using the unset() function in PHP then it is no need to be considered at all to set. The isset() function will return the value TRUE only if the variable existed which is not NULL. Otherwise isset() function will return the value FALSE value when the function will check the variable which is assigned to the NULL term. NULL character “
The above is the detailed content of isset() Function 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
Previous article：trim() in PHPNext article：trim() in PHP