在每个 PHP 回溯级别获取范围内的变量? [英] Get variables in scope at each PHP backtrace level?

问题描述

有没有办法在回溯中查看每个堆栈帧中设置的变量?我可以非常接近 debug_backtrace(true) 的组合来获取对象，在每个对象上使用 get_object_vars 来获取 $this vars，args> 在每个回溯帧中键入键，并使用 get_defined_vars 获取全局变量，但是在函数中设置的任何临时变量我都找不到检索方法.

Is there a way to view the variables set in each stack frame in a backtrace? I can come pretty close with a combination of debug_backtrace(true) to get the objects, get_object_vars on each object to get $this vars, the args key in each backtrace frame, and get_defined_vars to get globals, but any temporary variables set within a function I can't find a way to retrieve.

这是一个示例情况:

function method1($foo) {
    $temp = method2($foo + 1);
    foreach ($temp as $t) {
        method2($t);
    }
}

function method2($bar) {
    $temp2 = $bar->value + $_GET['val'];
    debug();
}

function debug() {
    // to be created
    $global_scope = get_defined_vars();
    $bt = debug_backtrace(true);
}

我可以通过回溯中的args键获得$foo和$bar，对象变量$bar 到 get_object_vars，全局变量到 get_defined_vars.我想要获得 $temp2 和 $temp 的值.

I can get $foo and $bar via the args key in the backtrace, the object variables of $bar through get_object_vars, and the globals through get_defined_vars. I want to get the value of $temp2 and $temp as well.

推荐答案

在(本地)服务器上安装并启用 XDebug.然后使用 xdebug_get_declared_vars().确保在 xdebug .ini 文件中将 xdebug.collect_vars 设置为 On.

Install and Enable XDebug on your (local) server. Then use xdebug_get_declared_vars(). Make sure that you set xdebug.collect_vars to On in your xdebug .ini file.

<?php
    class strings {
        static function fix_strings($a, $b) {
            foreach ($b as $item) {
            }
            var_dump(xdebug_get_declared_vars());
        }
    }
    strings::fix_strings(array(1,2,3), array(4,5,6));
?>

返回:

array
  0 => string 'a' (length=1)
  1 => string 'b' (length=1)
  2 => string 'item' (length=4)

^{来自 xdebug.org}

请注意，该函数仅返回调用函数 xdebug_get_declared_vars() 的范围内的变量.

Note, that the function only returns variables in the scope where the function xdebug_get_declared_vars() is called in.

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