XMLReader::open

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

    XMLReader::open — Set the URI containing the XML to parse

    Description

    public static XMLReader::open(string $uri, ?string $encoding = null, int $flags = 0): XMLReader
    public XMLReader::open(string $uri, ?string $encoding = null, int $flags = 0): bool

    Set the URI containing the XML document to be parsed.

    Parameters

    uri

    URI pointing to the document.

    encoding

    The document encoding or null.

    flags

    A bitmask of the LIBXML_* constants.

    Return Values

    Returns true on success or false on failure. If called statically, returns an XMLReader or false on failure.

    Errors/Exceptions

    • Passing an invalid encoding will throw a ValueError.
    • This method may be called statically, but prior to PHP 8.0.0, will issue an E_DEPRECATED error in this case.

    Changelog

    Version Description
    8.4.0 Passing an invalid encoding will now throw a ValueError.
    8.0.0 XMLReader::open() is now declared as static method, but can still be called on an XMLReader instance.

    See Also

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    User Contributed Notes 5 notes

    up
    10
    den at nurfuerspam dot de
    7 years ago
    If you like to read the XML from HTTP whit a POST request, you can use libxml_set_streams_context.
    Example:

    <?php

    $param     = array('http' => array(
    'method' => 'POST',
    'header' => "Content-type: application/x-www-form-urlencoded\r\n",
    'content' => http_build_query(array(
    'post_param1' => 'value1',
    'post_param2' => 'value2',
    )),
    ));
    libxml_set_streams_context(stream_context_create($param));
    $reader = XMLReader::open('https://example.com/get.php?get_param=value3');

    ?>
    up
    9
    dave at sophoservices dot com
    8 years ago
    When using the XmlReader to read local XML files, remember it the open function requests a URI. Add 'file://' to the front of the FULL path to the XML. Otherwise you may get:

    PHP Warning: XMLReader::open(): Unable to open source data in ...
    up
    3
    alvaro at demogracia dot com
    10 years ago
    XML can optionally declare its own encoding:

    <?xml version="1.0" encoding="UTF-8"?>

    You can use the $encoding parameter to provide this information (if missing) or override it (if wrong).

    Output is always UTF-8 (that's how libxml works).
    up
    0
    crungmungus at gmail dot com
    16 years ago
    Windows users remember to enable php_openssl.dll in your php.ini if you want to be able to use this function (and others) with a HTTPS URL.
    up
    -3
    mood(_a_)twolate.com
    8 years ago
    For some reasons, the open() method keep throwing me this error :

    PHP Warning: XMLReader::open(): Unable to open source data in /var/www/nota/ethamap/fat_xml.php

    It doesn't make sense as the xml file target hosted on my server is perfectly reachable. Adding this line before invoking open() fixed it :

    libxml_disable_entity_loader(false);

    Please view https://bugs.php.net/bug.php?id=62577
    It is somehow related.
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