PHP-XML: How do I modify text value of a given target

Question

<?xml version="1.0" encoding="utf-8" ?>
<xliff>
    <body>
        <trans-unit id="NFDBB2FA9-tu4" xml:space="preserve">
            <source xml:lang="en">He</source>
            <target xml:lang="id">He</target>
        </trans-unit>
        <trans-unit id="NFDBB2FA9-tu5" xml:space="preserve">
            <source xml:lang="en">She</source>
            <target xml:lang="id">She</target>
        </trans-unit>
    </body>
    <body>
        <trans-unit id="NFDBB2FA9-tu6" xml:space="preserve">
            <source xml:lang="en">They</source>
            <target xml:lang="id">They</target>
        </trans-unit>
        <trans-unit id="NFDBB2FA9-tu7" xml:space="preserve">
            <source xml:lang="en">We</source>
            <target xml:lang="id">We</target>
        </trans-unit>
    </body>
</xliff>

how do I modify value of <target> of trans-unit id="NFDBB2FA9-tu7" or any other?

done this but empty on the print_r and don't know what's next

$dom = new \DOMDocument();
$dom->load("my.xlf");
$root = $dom->documentElement;
$xliffBodies = $root->getElementsByTagName("body")->item(0);

foreach ($xliffBody as $body) {
    $el = $body->getElementsByTagName("trans-unit");
    print_r($el);
}

Professor Abronsius · Accepted Answer · 2021-02-28 08:18:31Z

2

The code below is using a string representation of the original XML file (my.xlf) for convenience - change the loadXML for load to load your file.

If you use an XPath expression you can target these elements directly - though here I targeted the trans-unit node initially before selecting the child node - target

<?php

    $strxml='<?xml version="1.0" encoding="utf-8" ?>
<xliff>
    <body>
        <trans-unit id="NFDBB2FA9-tu4" xml:space="preserve">
            <source xml:lang="en">He</source>
            <target xml:lang="id">He</target>
        </trans-unit>
        <trans-unit id="NFDBB2FA9-tu5" xml:space="preserve">
            <source xml:lang="en">She</source>
            <target xml:lang="id">She</target>
        </trans-unit>
    </body>
    <body>
        <trans-unit id="NFDBB2FA9-tu6" xml:space="preserve">
            <source xml:lang="en">They</source>
            <target xml:lang="id">They</target>
        </trans-unit>
        <trans-unit id="NFDBB2FA9-tu7" xml:space="preserve">
            <source xml:lang="en">We</source>
            <target xml:lang="id">We</target>
        </trans-unit>
    </body>
</xliff>';

    $dom=new DOMDocument;
    $dom->loadXML($strxml);
    
    $xp=new DOMXPath($dom);
    $xp->registerNamespace('xml','http://www.example.com');
    
    $col=$xp->query( '//xliff/body/trans-unit' );
    if( $col && $col->length ){
        foreach( $col as $node ){
            $target=$xp->query('target',$node)->item(0);
            $target->nodeValue='banana';
        }
    }
    
    printf('<textarea cols=50 rows=10>%s</textarea>',$dom->saveXML());

?>

A simple edit - change the target value to the word banana yields:

The original snippet of XML is a little different from the actual XML in that there are namespace declarations which mean you need to adopt a slightly different approach. More Information on Namespaces

The default namespace needs to be used in the query, like so:

<?php

    $id='NFDBB2FA9-tu26';
    
    $file='my.xlf';

    $dom=new DOMDocument;
    $dom->load( $file );
    
    $xp=new DOMXPath( $dom );
    # We need to use this in the XPath query - this could be almost anything but best kept short!!
    $xp->registerNamespace('f','urn:oasis:names:tc:xliff:document:1.2');
    
    # Not essential to declare the following when simply querying against the default namespace
    $xp->registerNamespace('okp','okapi-framework:xliff-extensions');
    $xp->registerNamespace('its','http://www.w3.org/2005/11/its');
    $xp->registerNamespace('itsxlf','http://www.w3.org/ns/its-xliff/');
    $xp->registerNamespace('xml','http://www.example.com');
    
    # note how each portion of the XPath expression uses our namespace prefix..
    $col=$xp->query( '//f:xliff/f:file/f:body/f:trans-unit[@id="'.$id.'"]/f:target' );
    
    
    
    if( $col && $col->length ){
        foreach( $col as $node ){
            $node->nodeValue='Big Bold Brave Banana';
        }
    }
    
    printf('<textarea cols=180 rows=40>%s</textarea>',$dom->saveXML());

?>

edited Feb 28, 2021 at 8:18

answered Feb 27, 2021 at 15:03

Professor Abronsius

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6 Comments

mending3 Over a year ago

could it target a specific target inside a given <trans-unit id> ?

Professor Abronsius Over a year ago

yes - you can be very specific wit hthe XPath expression. If you know an ID or a particular attribute you can build the Xpath expression to explicitly target that element

mending3 Over a year ago

I'm reproducing on this but can't get it to work. xpather.com/HJhVshob . this is what I've done : pastebin.com/uEMMkC1s . it returns 0 on DOMNodeList

Professor Abronsius Over a year ago

Perhaps a quick read of the PHP manual might help? Essentially your XPath expression is missing the initial // and does not use the default namespace in the XPath expression

mending3 Over a year ago

on this: $node->nodeValue='Big Bold Brave Banana';. if I insert it as html code, e.g. $node->nodeValue='<some id="1">Big Bold Brave Banana'; . this is not encoded . how do I encode it?

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