Search results for: "DNS checks"

What are some common techniques for checking if a key already exists in a PHP array before adding a new value?

When adding a new value to a PHP array, it is important to check if the key already exists to avoid overwriting existing data. One common technique is...

What are the potential security risks associated with using the isset() function in PHP for login forms?

Using the isset() function in PHP for login forms can pose a security risk as it only checks if a variable is set and not if it has a valid value. Thi...

What resources are recommended for PHP beginners to learn about functions like !isset?

When working with PHP, it is important to understand functions like !isset, which checks if a variable is not set or is null. This is commonly used to...

What is the potential issue with using isset() in PHP when including a file based on a variable?

The potential issue with using isset() in PHP when including a file based on a variable is that isset() only checks if a variable is set and not if it...

How can a PHP script define a variable that is true when a fatal error occurs, in order to end the script with a custom message?

To handle fatal errors in PHP and end the script with a custom message, you can define a variable that will be set to true when a fatal error occurs....