php Twig - 如何检查变量是否为数字/整数
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Twig - How to check if variable is a number / integer
提问by Krzysztof Trzos
How to check if variable is a number, integer or float? I can't find anything about this. Making project in Symfony 3.
如何检查变量是数字、整数还是浮点数？我找不到任何关于此的信息。在 Symfony 3 中制作项目。
回答by Krzysztof Trzos
At last found something. One of the answers from: https://craftcms.stackexchange.com/questions/932/how-to-check-variable-type
终于找到东西了。答案之一：https: //craftcms.stackexchange.com/questions/932/how-to-check-variable-type
{# Match integer #}
{% if var matches '/^\d+$/' %}
{% endif %}
{# Match floating point number #}
{% if var matches '/^[-+]?[0-9]*\.?[0-9]+$/' %}
{% endif %}
回答by Pierre-Olivier Vares
You can create a twig extension to add a test "numeric"
您可以创建一个树枝扩展来添加测试“数字”
Create your extension class :
创建您的扩展类：
namespace MyNamespace;
class MyTwigExtension extends \Twig_Extension
{
public function getName()
{
return 'my_twig_extension';
}
public function getTests()
{
return [
new \Twig_Test('numeric', function ($value) { return is_numeric($value); }),
];
}
}
And in your configuration :
在您的配置中：
services:
my_twig_extension:
autowire: true
class: AppBundle\MyNamespace\MyTwigExtension
tags:
- { name: twig.extension }
See documentation :
请参阅文档：
https://twig.symfony.com/doc/2.x/advanced.html#tests
https://twig.symfony.com/doc/2.x/advanced.html#tests
https://symfony.com/doc/current/templating/twig_extension.html
https://symfony.com/doc/current/templating/twig_extension.html
