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Reference — What does this symbol mean in PHP?

What is this?

This is a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.

Why is this?

It used to be hard to find questions about operators and other syntax tokens.¹
The main idea is to have links to existing questions on Stack Overflow, so it's easier for us to reference them, not to copy over content from …

php arguments symbols operators

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21
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使用&符号启动PHP函数意味着什么?

我正在使用带有此代码的Facebook库:

class FacebookRestClient {
...
    public function &users_hasAppPermission($ext_perm, $uid=null) {
        return $this->call_method('facebook.users.hasAppPermission', 
        array('ext_perm' => $ext_perm, 'uid' => $uid));
    }
...
}
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函数定义的开头是什么意思,以及我如何使用这样的库(在一个简单的例子中)

php oop

126
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3
解决办法
5万
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php ×2

arguments ×1

oop ×1

operators ×1

symbols ×1