PHPRunner manual
Debugging tips

When your projects do not work as expected, especially when you use a load of events and custom code, you can use the following debugging techniques to resolve the issue. 1. Print all executed SQL statements on the Web page For this purpose set $dDebug variable in include/dbcommon.php file to true. Especially useful when you need to resolve master-details or advanced security issues. You can copy SQL query and run it against your database manually to see if it returns correct results. To run SQL query manually use tools that comes with your database (Query designer in MS Access, Enterprise Manager in SQL Server, phpMyAdmin in MySQL).   2. Print out variables using echo statement The echo command is used to write output to a browser. The following example sends the text "Hello World" to the browser: echo "Hello World"; Here are several examples of how you can use echo command Print variable value echo "Variable name: " . $variable; In BeforeAdd/BeforeEdit events you can print form field value echo "field_name: " . $values["field_name"]; Displaying Session variable that stores logged in user id echo "UserID: " . $_SESSION["UserID"]; Displaying IP address of logged in user echo "Your IP address: " . $_SERVER['REMOTE_ADDR'];