用于检测Internet Explorer 11的正则表达式 [英] Regular expression to detect Internet Explorer 11

问题描述

我正在使用preg_match字符串

preg_match('/Trident/7.0; rv:11.0/',$_SERVER["HTTP_USER_AGENT"]

以检测IE11，因此可以为其启用平板电脑模式.但是，它返回"unknown delimiter 7".

to detect IE11 so I can enable tablet mode for it. However it returns "unknown delimiter 7".

在没有PHP抱怨的情况下如何做到这一点?

How can I do this without PHP complaining at me?

推荐答案

这真的是正则表达式还是只是文字字符串?如果只是字符串，则可以使用 strpos 函数.

Is this really a regular expression or just a literal string? If it's just a string, you can use the strpos function instead.

if (strpos($_SERVER['HTTP_USER_AGENT'], 'Trident/7.0; rv:11.0') !== false) {
    // your code
}

如果是正则表达式，则必须转义特殊字符，例如/和.

If it's a regular expression, you must escape special characters like / and .

您可以在此答案的注释中看到，该代码无法在所有情况下正确检测IE 11.我并没有真正测试它是否匹配它，我只是将问题创建者的代码调整为使用strpos而不是preg_match，因为它的应用方式不正确.

You can see in the comments of this answer that the code doesn't detect IE 11 properly in all cases. I didn't actually test it to match it, I've just adjusted the code of the question creator to use strpos instead of preg_match because it was applied incorrectly.

如果您想要一种可靠的方法来检测IE 11，请查看其他答案.

If you want a reliable way to detect IE 11 please take a look at the other answers.

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