The PHP debug_backtrace() function generates a PHP backtrace which displays data from the code that led up to the debug_backtrace() function.

The possible returned elements are:

• Function (string) – The current function name
• Line (integer) – The current line number
• Files (string) – The current file name
• Class (string) – The current class name
• Object (object) – The current object
• Type (string) – The current call type:
  • Returns: “->” – Method call
  • Returns: “::” – Static method call
  • Returns nothing – Function call
• Args (array) – If inside a function, it lists the functions arguments; if inside an included file, it lists the included file names

<?php
function a($txt) {
    b('Hello');
}

function b($txt) {
    c('World');
}

function c($txt) {
    var_dump(debug_backtrace());
}

a('Chicken');
?>

array(3) { [0]=> array(4) { ["file"]=> string(21) "/home/test.php" ["line"]=> int(7) ["function"]=> string(1) "c" ["args"]=> array(1) { [0]=> string(5) "World" } } [1]=> array(4) { ["file"]=> string(21) "/home/test.php" ["line"]=> int(3) ["function"]=> string(1) "b" ["args"]=> array(1) { [0]=> string(5) "Hello" } } [2]=> array(4) { ["file"]=> string(21) "/home/test.php" ["line"]=> int(14) ["function"]=> string(1) "a" ["args"]=> array(1) { [0]=> string(7) "Chicken" } } }

debug_backtrace(options, limit);