PHP to get the name of the function that called the current function

<?php

// Get the name of the function that called the current function
$callingFunction = debug_backtrace()[1]['function'];

// Print the name of the calling function
echo "The calling function is: $callingFunction";

?>

This code solution uses the debug_backtrace() function to get a backtrace of the current function call stack. The debug_backtrace() function returns an array of frames, each of which contains information about a function call. The first frame in the array is the current function call, and the second frame is the function that called the current function.

The code solution gets the name of the calling function by accessing the 'function' key of the second frame in the debug_backtrace() array. The value of the 'function' key is the name of the calling function.

This code solution can be implemented effectively by using it in conjunction with a custom error handler. A custom error handler can be used to catch errors and log them to a file or database. The error handler can also use the debug_backtrace() function to get a backtrace of the current function call stack and log the name of the function that called the current function. This information can be useful for debugging purposes.