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    XMLReader::lookupNamespace

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    XMLReader::lookupNamespace — Lookup namespace for a prefix

    说明

    public XMLReader::lookupNamespace(string $prefix): ?string

    Lookup in scope namespace for a given prefix.

    参数

    prefix

    String containing the prefix.

    返回值

    The value of the namespace, or null if no namespace exists.

    更新日志

    版本 说明
    8.0.0 This function can no longer return false.
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