xml_parser_create

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

xml_parser_create — Crea un parser XML

Descrizione

xml_parser_create(string $encoding = ?): resource

xml_parser_create() crea un nuovo parser XML e restituisce un handle che si riferisce ad esso da utilizzarsi con le altre funzioni XML.

Elenco dei parametri

encoding: Il parametro opzionale encoding indica la codifica dei caratteri in input ed output per il PHP 4. A partire dal PHP 5, la codifica dell'input è determinata automaticamente, pertanto il parametro encoding indica solo dal codifica dell'output. In PHP 4, la codifica di default dell'output è la medesima utilizzata dall'input. Se si indica una stringa vuota, il parser tenta di inviduare la codifica utilizzata per il documento guardando l'intestazione dello stesso per 3 o 4 byte. In PHP 5.0.0 a 5.0.1, il set di caratteri di default è l' ISO-8859-1, mentre in PHP 5.0.2 e successivi è UTF-8. Le codifiche supportate sono ISO-8859-1, UTF-8 e US-ASCII.

Valori restituiti

Restituisce un handle della risorsa per il nuovo parser XML.

Vedere anche:

xml_parser_create_ns() - Crea un parser XML con il supporto dello spazio dei nomi
xml_parser_free() - Cancella un parser XML

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User Contributed Notes 7 notes

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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

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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.

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-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

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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.

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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)

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-7

Anonymous ¶

18 years ago


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

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-9

juanhdv at NOSPAM dot divvol dot org ¶

17 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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