Memory leak in xml and dom

### Description

The following code:

```php
<?php
$aDOM = new DOMDocument();
$fromdom = new DOMDocument();
$fromdom->loadXML('<data xmlns:ai="https://test.org" ai:attr="namespaced" />');
$attr= $fromdom->firstChild->attributes->item(0);
$att = $aDOM->importNode($attr);
?>
```

Resulted in this output:
```
=================================================================
==1967160==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 48 byte(s) in 1 object(s) allocated from:
    #0 0x55568de88c0e in malloc (/usr/local/bin/php+0x1c88c0e) (BuildId: c0213df21908f588a04dfadca2142af951d35e31)
    #1 0x7fe0647a6b0d in xmlNewNs (/lib/x86_64-linux-gnu/libxml2.so.2+0x61b0d) (BuildId: aebf8e42966c3ce475ff9d9d51a762831adcbb61)

Indirect leak of 19 byte(s) in 2 object(s) allocated from:
    #0 0x55568de88c0e in malloc (/usr/local/bin/php+0x1c88c0e) (BuildId: c0213df21908f588a04dfadca2142af951d35e31)
    #1 0x7fe0648287f2 in xmlStrdup (/lib/x86_64-linux-gnu/libxml2.so.2+0xe37f2) (BuildId: aebf8e42966c3ce475ff9d9d51a762831adcbb61)
```


### PHP Version

nightly

### Operating System

ubuntu 22.04

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Memory leak in xml and dom #14343

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Memory leak in xml and dom #14343

Description

Description

PHP Version

Operating System

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

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