PHP 5.5.16 is released

Exception::getTrace

(PHP 5 >= 5.1.0)

Exception::getTraceObtém a stack trace

Descrição

final public array Exception::getTrace ( void )

Retorna a stack trace da exceção.

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

Retorna a stack trace da exceção como um array.

Exemplos

Exemplo #1 Exemplo da Exception::getTrace()

<?php
function test() {
 throw new 
Exception;
}

try {
 
test();
} catch(
Exception $e) {
 
var_dump($e->getTrace());
}
?>

O exemplo acima irá imprimir algo similar à:

array(1) {
  [0]=>
  array(4) {
    ["file"]=>
    string(22) "/home/bjori/tmp/ex.php"
    ["line"]=>
    int(7)
    ["function"]=>
    string(4) "test"
    ["args"]=>
    array(0) {
    }
  }
}

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User Contributed Notes 3 notes

up
7
sam at notmyrealemail dot org
2 years ago
Two important points about this function which are not documented:

1) The trace does not include the file / line at which the exception is thrown; that entry is only recorded in the top-level getFile/Line methods.

2) Elements are returned in 'closest-first' order, e.g. if you have a script x which calls function y which calls function z which throws an exception, then the first trace element will be 'Y' and the second will be 'X'.
up
3
andreas at cap-systems dot com
4 years ago
When calling getTrace(), there is also the name of the class in returned array:

<?php
 
class Test {

    function
__construct() {

      throw new
Exception('FATAL ERROR: bla bla...');

    }

  }

  try {

   
$obj = new Test();

  } catch(
Exception $e) {

   
var_dump($e->getTrace());

  }
?>

Will show something like:

array(1) {
  [0]=>  array(6) {
               ["file"]=>  string(54) "/....../test.php"
               ["line"]=>  int(37)
               ["function"]=>  string(11) "__construct"
               ["class"]=>  string(4) "Test"
               ["type"]=>  string(2) "->"
               ["args"]=>  array(0) { }
             }
}

You can use this function to format a exception:

<?php
 
function MakePrettyException(Exception $e) {
   
$trace = $e->getTrace();

   
$result = 'Exception: "';
   
$result .= $e->getMessage();
   
$result .= '" @ ';
    if(
$trace[0]['class'] != '') {
     
$result .= $trace[0]['class'];
     
$result .= '->';
    }
   
$result .= $trace[0]['function'];
   
$result .= '();<br />';

    return
$result;
  }

 
//Example:
 
try {

   
$obj = new Test();

  } catch(
Exception $e) {

    echo
MakePrettyException($e);

  }

?>

Result:

Exception: "FATAL ERROR: bla bla..." @ Test->__construct();
up
0
knivey
1 year ago
The order of the trace starts at the source of the exception and does not include main.
So for example:

<?php
function Bar() {
throw new
Exception;
}

function
Foo() {
Bar();
}

try {
Foo();
} catch(
Exception $e) {
var_dump($e->getTrace());
}
?>

Will output:

array(2) {
  [0]=>
  array(4) {
    ["file"]=>
    string(21) "/.../test.php"
    ["line"]=>
    int(8)
    ["function"]=>
    string(3) "Bar"
    ["args"]=>
    array(0) {
    }
  }
  [1]=>
  array(4) {
    ["file"]=>
    string(21) "/.../test.php"
    ["line"]=>
    int(12)
    ["function"]=>
    string(3) "Foo"
    ["args"]=>
    array(0) {
    }
  }
}
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