PHP打印调用堆栈的三种方法

港控/mmm° 2022-03-22 15:10 1246阅读 0赞

### **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)