Search results for: "boolean expressions"

What is the recommended data type in a MySQL database for storing boolean values from PHP checkboxes?

When storing boolean values from PHP checkboxes in a MySQL database, it is recommended to use the TINYINT data type with a length of 1. This allows yo...

How can array_sum be used to validate an array containing only boolean values in PHP?

To validate an array containing only boolean values in PHP using array_sum, we can sum up all the values in the array and check if the sum is equal to...

How does PHP handle the conversion of certain string values like "on" and "off" to boolean true and false?

PHP automatically converts certain string values like "on", "true", "yes", and "1" to boolean true, and values like "off", "false", "no", and "0" to b...

What are the potential pitfalls of using "WAHR" as a string for boolean values in PHP?

Using "WAHR" as a string for boolean values in PHP can lead to confusion and potential errors in code readability. It is not a standard or intuitive w...

What common mistakes can lead to the error message "mysql_num_rows() expects parameter 1 boolean given" in PHP?

The error message "mysql_num_rows() expects parameter 1 boolean given" occurs when the function expects a result set as the parameter, but receives a...