How to include php source line number in user error message?

Question

I want to make my own error generator when I program (HTML + PHP). How can I take a string when I have an error and insert a variable?

Example:

echo "Error # 03: variable undefined string # ". $ line. " ";

Thank.

Answer 1

the variables you are looking for:

__LINE__
__FILE__
__FUNCTION__
__CLASS__

Answer 2

there is a predefined constant, __LINE__which contains the string in which it was actually called.

, , trigger_error() " ", . , , PHP, - - ,

debug_backtrace().

Answer 3

, PHP , . ( , script ), , .

If PHP does not display error messages, use the following code to display all PHP error messages and warnings on the page:

error_reporting(E_ALL);