- Categories: PHP Functions, PHP Reference, Reference
Quick Reference
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
Output
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" } } }
Syntax
debug_backtrace(options, limit);
Parameters
Parameter | Description |
---|---|
options | Specifies a bitmask for the following options:
|
limit | Limits the number of stack frames printed. By default (limit=0) it prints all stack frames |
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PHP NOTES:
- When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
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