Twig 的转储函数返回一个空白屏幕 [英] Twig's dump function returns a blank screen
问题描述
我在 Symfony2 中使用 Twig 的 dump 函数.我已经根据 其说明配置了 Symfony.
I am using Twig's dump function in Symfony2. I have configured Symfony according to its instructions.
我有一个 page
变量和一个 orders
数组.dump
适用于页面,但不适用于订单.当我按订单调用它时,我得到一个白屏 - 没有 php 错误或任何东西.我不知道如何调试这个.
I have a page
variable, and an orders
array. dump
works on page, but not orders. When I call it on orders, I get a white screen - no php errors or anything. I have no idea how to debug this.
有什么想法吗?
推荐答案
一点说明
在这种情况下,白色(空白)屏幕表示 PHP 致命错误:允许的内存大小已耗尽.在我的调查中,我发现 twig 在我安装了 VarDumper 组件时使用了var_dump
函数.
A little explanation
A white (blank) screen in this case means the PHP fatal error: Allowed memory size exhausted. During my investigation, I found that twig uses thevar_dump
function while I have VarDumper component installed.
我认为它可以在未安装 VarDumper 组件的情况下工作,但是 symfony 的 VarDumper 组件文档中涵盖的 twig 的 dump()
函数就像一个复杂的解决方案,这很奇怪.
I think its made to work along in case the VarDumper component is not installed, but twig's dump()
function covered in symfony's VarDumper component documentation like a complex solution, that's strange.
因此,使用 VarDumper 的 dump()
函数而不是本机 var_dump()
解决了内存问题(因为 VarDumper 将结果转储收集限制为适量).此外,VarDumper 的 dump()
提供了更方便的结果 - 您可以单击树叶来显示/隐藏其内容.
So, using VarDumper's dump()
function instead of native var_dump()
solves the memory problem (because VarDumper limits result dump collection to adequate amount). Also VarDumper's dump()
give more convenient results - you can click on tree leafs to show/hide its content.
- 安装 VarDumper 组件(如果未安装)
- 转到文件:
vendor/twig/twig/lib/Twig/Extension/Debug.php
- 查找
twig_var_dump
函数 - 将所有
var_dump()
调用替换为dump()
- 删除/注释
ob_start() + ob_get_clean()
构造(需要如果您使用var_dump()
因为它立即回显数据,但是dump()
更聪明)
- Install VarDumper component if not installed
- Go to file:
vendor/twig/twig/lib/Twig/Extension/Debug.php
- Find
twig_var_dump
function - Replace all
var_dump()
calls todump()
- Delete/comment
ob_start() + ob_get_clean()
construction (which is needed if you usevar_dump()
as it echoes data immideately, butdump()
acting more intelligent)
或
使用这个复制+替换整个函数:
copy + replace the entire function using this:
function twig_var_dump(Twig_Environment $env, $context)
{
if (!$env->isDebug()) {
return;
}
$count = func_num_args();
if (2 === $count) {
$vars = array();
foreach ($context as $key => $value) {
if (!$value instanceof Twig_Template) {
$vars[$key] = $value;
}
}
dump($vars);
} else {
for ($i = 2; $i < $count; $i++) {
dump(func_get_arg($i));
}
}
}
PS:问题是在 2013 年提出的,但我希望它有所帮助,因为我现在遇到了这个问题.
PS: Question's asked in 2013, but I hope it helps because I had this problem now.
我的背景:
"symfony/symfony": "2.5.*"
"symfony/var-dumper": "~2.6"
这篇关于Twig 的转储函数返回一个空白屏幕的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!