Fix examples whose documented output doesn't match Run code

[KentarouTakeda]

Every example that has a Run code button and declares its output with &example.outputs; (832 of them) was run and compared against its <screen>.

This PR is the subset where the fix needs no judgement: each hunk can be confirmed by clicking Run code on the page.

One commit per group:

• Broken examples: two have no <?php so Run code prints the source instead of running it, one calls getName() on the getShortName() page.
• DOM XML declaration: saveXML() emits it, the screen drops it or drops the encoding the document declares.
• Formatting var_dump()/print_r() never produce: indentation, [0] => for [0]=>, hand alignment, spaces where the data holds tabs.
• Wrong values: stale line numbers and offsets, a wrong ordering, a dropped semicolon, output split across lines that is really printed on one.
• One example read date('T') with no timestamp, so the page was right only half the year; the timestamp is now pinned and the screen is unchanged.

Pages to reproduce this on

Click any page and press Run code: the output that appears is what this PR puts in the <screen>. The static <screen> still shown on these pages is the "before" side of the diff, until the manual is rebuilt.

Fix two broken examples

• https://www.php.net/manual/en/uri-rfc3986-uri.withfragment.php
• https://www.php.net/manual/en/reflectionconstant.getshortname.php

Fix the XML declaration in DOM blocks

• https://www.php.net/manual/en/domdocument.append.php
• https://www.php.net/manual/en/domelement.before.php
• https://www.php.net/manual/en/dom-characterdata.before.php
• https://www.php.net/manual/en/dom-characterdata.remove.php
• https://www.php.net/manual/en/dom-characterdata.replacewith.php

Use the formatting var_dump() and print_r() actually produce

• https://www.php.net/manual/en/language.oop5.basic.php
• https://www.php.net/manual/en/language.oop5.lazy-objects.php
• https://www.php.net/manual/en/domelement.getattributenames.php
• https://www.php.net/manual/en/reflectionclass.getdefaultproperties.php
• https://www.php.net/manual/en/simplexmlelement.getdocnamespaces.php
• https://www.php.net/manual/en/function.simplexml-load-string.php
• https://www.php.net/manual/en/function.strtok.php
• https://www.php.net/manual/en/function.array-unshift.php
• https://www.php.net/manual/en/datetime.formats.php
• https://www.php.net/manual/en/function.array-unique.php
• https://www.php.net/manual/en/function.explode.php
• https://www.php.net/manual/en/function.libxml-set-external-entity-loader.php
• https://www.php.net/manual/en/function.ltrim.php
• https://www.php.net/manual/en/function.rtrim.php
• https://www.php.net/manual/en/function.trim.php
• https://www.php.net/manual/en/function.array-fill.php

Fix values that do not match the actual output

• https://www.php.net/manual/en/function.str-word-count.php
• https://www.php.net/manual/en/function.htmlentities.php
• https://www.php.net/manual/en/function.natsort.php
• https://www.php.net/manual/en/function.array-udiff-assoc.php
• https://www.php.net/manual/en/function.array-map.php
• https://www.php.net/manual/en/domnode.getlineno.php
• https://www.php.net/manual/en/domdocumentfragment.replacechildren.php
• https://www.php.net/manual/en/dom-htmldocument.createfromstring.php
• https://www.php.net/manual/en/language.oop5.basic.php
• https://www.php.net/manual/en/language.oop5.overloading.php
• https://www.php.net/manual/en/language.types.array.php
• https://www.php.net/manual/en/language.types.callable.php
• https://www.php.net/manual/en/control-structures.foreach.php
• https://www.php.net/manual/en/control-structures.goto.php
• https://www.php.net/manual/en/control-structures.switch.php
• https://www.php.net/manual/en/control-structures.match.php
• https://www.php.net/manual/en/function.preg-replace.php
• https://www.php.net/manual/en/simplexmlelement.children.php
• https://www.php.net/manual/en/reflectionclass.getdoccomment.php
• https://www.php.net/manual/en/xmlwriter.writecdata.php
• https://www.php.net/manual/en/function.date-sun-info.php
• https://www.php.net/manual/en/function.libxml-get-errors.php

Pin the timestamp in the date('T') example

• https://www.php.net/manual/en/function.date-default-timezone-get.php