PHPのお勉強！

PHP TOP
PHP 8.4.2 Released!

    xml_parser_create

    (PHP 4, PHP 5, PHP 7, PHP 8)

    xml_parser_create — XML パーサを作成する

    説明

    xml_parser_create(?string $encoding = null): XMLParser

    xml_parser_create() は新しい XML パーサを作成し、 他の XML 関数が使用する XMLParser のインスタンスを返します。

    パラメータ

    encoding

    入力のエンコーディングは 自動判定されるので、encoding パラメータは 出力のエンコーディングのみを指定することになります。 もし空の文字列が渡された場合、先頭の 3 あるいは 4 バイトの内容をもとに パーサがエンコーディングの判別を試みます。 ではデフォルトの出力文字セットは UTF-8 です。 サポートされるエンコーディングは ISO-8859-1、UTF-8 および US-ASCII です。

    戻り値

    新しい XMLParser のインスタンスを返します。

    変更履歴

    バージョン 説明
    8.0.0 この関数は XMLParser のインスタンスを返すようになりました。 これより前のバージョンでは、リソースが返され、失敗した場合は false が返っていました。
    8.0.0 encoding は、nullable になりました。

    参考

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 5 notes

    up
    13
    marek995 at seznam dot cz
    14 years ago
    I created a function, which combines xml_paresr_create and all functions around.

    <?php
    function html_parse($file)
    {
    $array = str_split($file, 1);
    $count = false;
    $text = "";
    $end = false;
    foreach(    $array as $temp)
    {
    switch(    $temp)
    {
    case     "<":
    between($text);
    $text = "";
    $count = true;
    $end = false;
    break;
    case     ">":
    if(    $end == true) {end_tag($text);}
    else {    start_tag($text);}
    $text = "";
    break;
    case     "/":
    if(    $count == true) {$end = true;}
    else {    $text = $text . "/";}
    break;
    default:
    $count = false;
    $text = $text . $temp;
    }
    }
    }
    ?>
    The input value is a string.
    It calls functions start_tag() , between() and end_tag() just like the original xml parser.

    But it has a few differences:
    - It does NOT check the code. Just resends values to that three functions, no matter, if they are right
    - It works with parameters. For example: from tag <sth b="42"> sends sth b="42"
    - It works wit diacritics. The original parser sometimes wrapped the text before the first diacritics appearance.
    - Works with all encoding. If the input is UTF-8, the output will be UTF-8 too
    - It works with strings. Not with file pointers.
    - No "Reserved XML name" error
    - No doctype needed
    - It does not work with commentaries, notes, programming instructions etc. Just the tags

    definition of the handling functions is:

    <?php
    function between($stuff) {}
    ?>

    No other attributes
    up
    2
    jcalvert at gmx dot net
    20 years ago
    To maintain compatibility between PHP4 and PHP5 you should always pass a string argument to this function. PHP4 autodetects the format of the input if you leave it out whereas PHP5 will assume the format to be ISO-8859-1 (and choke on the byte order marker of UTF-8 files).

    Calling the function as <?php $res = xml_parser_create('') ?> will cause both versions of PHP to autodetect the format.
    up
    0
    Tobbe
    19 years ago
    The above "XML to array" code does not work properly if you have several tags on the same level and with the same name, example:

    <currenterrors>
    <error>
    <description>This is a real error...</description>
    </error>
    <error>
    <description>This is a second error...</description>
    </error>
    <error>
    <description>Lots of errors today...</description>
    </error>
    <error>
    <description>This is the last error...</description>
    </error>
    </currenterrors>

    It will then only display the first <error>-tag.
    In this case you will need to number the tags automatically or maybe have several arrays for each new element.
    up
    -1
    php at stock-consulting dot com
    19 years ago
    Even though I passed "UTF-8" as encoding type PHP (Version 4.3.3) did *not* treat the input file as UTF-8. The input file was missing the BOM header bytes (which may indeed be omitted, according to RFC3629...but things are a bit unclear there. The RFC seems to make mere recommendations concering the BOM header). If you want to sure that PHP treats an UTF-8 encoded file correctly, make sure that it begins with the corresponding 3 byte BOM header (0xEF 0xBB 0xBF)
    up
    -1
    bishop at php dot net
    5 years ago
    Internals has proposed[1] changing this extension from resource-based to object-based. When this change is made, xml_parser_create will return an object, not a resource. Application developers are encouraged to replace any checks for explicit success, like:

    <?php
    $res     = xml_parser_create(/*...*/);
    if (!     is_resource($res)) {
    // ...
    }
    ?>

    With a check for explicit failure:
    <?php
    $res     = xml_parser_create(/*...*/);
    if (    false === $res) {
    // ...
    }

    [    1]: https://marc.info/?l=php-internals&m=154998365013373&w=2
    ＋add a note
    To Top