xml_parser_create

(PHP 4, PHP 5, PHP 7)

xml_parser_create — Crea un intérprete XML

Descripción

xml_parser_create ([ string $encoding ] ) : resource

xml_parser_create() crea un nuevo intérprete XML y devuelve un identificador del recurso al que hace referencia, para ser usado por otras funciones XML.

Parámetros

encoding: El parámetro opcional encoding especifica la codificación de caracteres para entrada y salida en PHP4. A partir de PHP5, la codificación de entrada se detecta automaticamente, así que el parámetro encoding especifica solo la codificación de salida. En PHP 4, la codificación por defecto de salida es la misma que la del juego de caracteres de la entrada. Si se le pasa una cadena vacia, el intérprete intenta identificar cual es la codificación del documento mirando los 3 o 4 primeros bytes. En PHP 5.0.0 y 5.0.1, el juego de caracteres por defecto es ISO-8859-1, mientras que en PHP 5.0.2 y superior es UTF-8. Las codificaciones soportadas son ISO-8859-1, UTF-8 y US-ASCII.

Valores devueltos

Devuelve un identificador del recurso para el nuevo intérprete XML.

Ver también

xml_parser_create_ns() - Crea un analizador XML con soporte para espacios de nombres
xml_parser_free() - Liberar una analizador XML

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User Contributed Notes 7 notes

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marek995 at seznam dot cz ¶

9 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

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jcalvert at gmx dot net ¶

15 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.

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Tobbe ¶

14 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.

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-1

bishop at php dot net ¶

9 months 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

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php at stock-consulting dot com ¶

14 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)

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-7

Anonymous ¶

13 years ago


I'd also recommend adding the option below 
xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,1);

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-8

juanhdv at NOSPAM dot divvol dot org ¶

12 years ago


In PHP 5, when including in your xml file the definition '<?xml version="1.0" encoding="ISO-8859-1" ?>',   I'd also recommend adding the option below:
 
xml_parser_set_option($xml_parser,XML_OPTION_TARGET_ENCODING, "ISO-8859-1").

It works fine!

If your enconding is 'UTF-8', just replace 'ISO-8859-1'.

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