PHPdebug_backtrace函数

PHP debug_backtrace() 函数生成一个 backtrace

该函数返回一个关联数组。

下面是可能返回的元素

For Example one:

classHello{private$var;
        public$var2;
        protected$var3;

    publicfunction__construct($var,$var2,$var3){$this->var=$var;
            $this->var2=$var2;
            $this->var3=$var3;
        } 
   }


functiontest(Hello $hello){echo"Hi this is a test function"."
";
        print_r(debug_backtrace());
}

$hello2=new Hello('A','B','C');
test($hello2);

实例One输出结果如下：

Hi this is a test function
Array ( [0] => Array (
[file] => D:\www\MyProjecttest\index4.php
[line] => 52
[function] => test
[args] => Array ( [0] => Hello Object ( [var:Hello:private] => A [var2] => B [var3:protected] => C ) ) ) )

注：在此只输出四个参数，分别是：file，line，function，args；

For Example Two:

classHello{private$var;
        public$var2;
        protected$var3;

   publicfunction__construct($var,$var2,$var3)                   {$this->var=$var;
      $this->var2=$var2;
      $this->var3=$var3;
 } 

   functiontest(Hello $hello){echo"Hi this is a test function"."
";
       print_r(debug_backtrace());
   }
}

$hello2=new Hello('A','B','C');
$hello2->test($hello2);

实例Two输出结果如下：

Hi this is a test function
Array ( [0] => Array (
[file] => D:\www\MyProjecttest\index4.php
[line] => 54
[function] => test
[class] => Hello
[object] => Hello Object ( [var:Hello:private] => A [var2] => B [var3:protected] => C )
[type] => ->
[args] => Array ( [0] => Hello Object ( [var:Hello:private] => A [var2] => B [var3:protected] => C ) ) ) )

注：在此所有参数都输出了，分别是：file，line，function，class,object,type,args；

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以上就介绍了PHP debug_backtrace 函数，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。