Search results for: "return values"

What potential issues can arise when using file_exists in PHP?

When using file_exists in PHP, one potential issue is that the function can return true for directories as well as files. To differentiate between the...

What potential issue is the user facing with the isset() function in PHP?

The potential issue the user may face with the isset() function in PHP is that it can return true even if a variable is set to null. To solve this iss...

What are some common errors or misunderstandings that can occur when using functions like mysql_fetch_assoc in PHP for data retrieval and display?

One common error when using functions like mysql_fetch_assoc in PHP is forgetting to check if the result set is empty before trying to fetch data. Thi...

What is the recommended way to retrieve the highest entry from a database in PHP?

To retrieve the highest entry from a database in PHP, you can use a SQL query with the ORDER BY clause to sort the entries in descending order based o...

In terms of performance and efficiency, is it advisable to use array_intersect over manual iteration for validating checkbox selections in PHP?

When validating checkbox selections in PHP, using array_intersect is advisable for performance and efficiency. This function compares arrays and retur...