PHP打印调用堆栈的三种方法

目录

一、debug_print_backtrace()

二、debug_backtrace()

三、Exception类中的getTraceAsString()成员函数返回一个调用堆栈

---

一、debug_print_backtrace()

//调用函数parent_func
function child_func() {
    parent_func();
}

//调用grandparent_func
function parent_func() {
    grandparent_func();
}

//打印调用堆栈
function grandparent_func() {
    debug_print_backtrace();
}

//主函数调用
child_func();

#0 grandparent_func() called at [D:\wamp\www\temp.php:10]
#1 parent_func() called at [D:\wamp\www\temp.php:5]
#2 child_func() called at [D:\wamp\www\temp.php:19]

 

二、debug_backtrace()

//调用函数parent_func
function child_func() {
    parent_func();
}

//调用grandparent_func
function parent_func() {
    grandparent_func();
}

//打印调用堆栈
function grandparent_func() {
    var_dump(debug_backtrace()); 
}

//主函数调用
child_func();

D:\wamp\www\temp.php:15:
array (size=3)
  0 => 
    array (size=4)
      'file' => string 'D:\wamp\www\temp.php' (length=27)
      'line' => int 10
      'function' => string 'grandparent_func' (length=16)
      'args' => 
        array (size=0)
          empty
  1 => 
    array (size=4)
      'file' => string 'D:\wamp\www\temp.php' (length=27)
      'line' => int 5
      'function' => string 'parent_func' (length=11)
      'args' => 
        array (size=0)
          empty
  2 => 
    array (size=4)
      'file' => string 'D:\wamp\www\temp.php' (length=27)
      'line' => int 19
      'function' => string 'child_func' (length=10)
      'args' => 
        array (size=0)
          empty

 

三、getTraceAsString()

Exception类中的getTraceAsString()成员函数返回一个调用堆栈

//调用函数parent_func
function child_func() {
    parent_func();
}

//调用grandparent_func
function parent_func() {
    grandparent_func();
}

//打印调用堆栈
function grandparent_func() {
    $e = new Exception; 
    var_dump($e->getTraceAsString()); 
}

//主函数调用
child_func();

D:\wamp\www\temp.php:16:string '#0 D:\wamp\www\temp.php(10): grandparent_func()
#1 D:\wamp\www\temp.php(5): parent_func()
#2 D:\wamp\www\temp.php(20): child_func()
#3 {main}' (length=162)