libxml_set_external_entity_loader

(PHP 5 >= 5.4.0, PHP 7)

libxml_set_external_entity_loaderChanges the default external entity loader

Descrierea

libxml_set_external_entity_loader ( callable|null $resolver_function ) : bool

Changes the default external entity loader.

Parametri

resolver_function

A callable that takes three arguments. Two strings, a public id and system id, and a context (an array with four keys) as the third argument. This callback should return a resource, a string from which a resource can be opened, or null.

Valorile întoarse

Întoarce valoarea true în cazul succesului sau false în cazul eșecului.

Exemple

Example #1 libxml_set_external_entity_loader() example

<?php
$xml 
= <<<XML
<!DOCTYPE foo PUBLIC "-//FOO/BAR" "http://example.com/foobar">
<foo>bar</foo>
XML;

$dtd = <<<DTD
<!ELEMENT foo (#PCDATA)>
DTD;

libxml_set_external_entity_loader(
    function (
$public$system$context) use($dtd) {
        
var_dump($public);
        
var_dump($system);
        
var_dump($context);
        
$f fopen("php://temp""r+");
        
fwrite($f$dtd);
        
rewind($f);
        return 
$f;
    }
);

$dd = new DOMDocument;
$r  $dd->loadXML($xml);

var_dump($dd->validate());
?>

Exemplul de mai sus va afișa:

string(10) "-//FOO/BAR"
string(25) "http://example.com/foobar"
array(4) {
    ["directory"]    => NULL
    ["intSubName"]   => NULL
    ["extSubURI"]    => NULL
    ["extSubSystem"] => NULL
}
bool(true)

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