Hello,
The following code:
$referenceNode = array(
'type' => 'paragraph',
'contains' => 'simple Word',
);
$styles = $docx->getWordStyles($referenceNode);
returns an empty array because the XML of the paragraph that contains that string (simple Word) doesn't have any pPr or pStyle:
<w:p w:rsidR="008518C0" w:rsidRDefault="00764101">
<w:r>
<w:t xml:space="preserve">This is </w:t>
</w:r>
<w:r w:rsidR="007B3611" w:rsidRPr="007B3611">
<w:t xml:space="preserve">a simple Word document </w:t>
</w:r>
<w:r>
<w:t xml:space="preserve">help us illustrate the </w:t>
</w:r>
<w:r w:rsidR="0000124E">
<w:t xml:space="preserve">capabilities of the </w:t>
</w:r>
<w:proofErr w:type="spellStart"/>
<w:r w:rsidR="0000124E">
<w:t>DOCXPath</w:t>
</w:r>
<w:proofErr w:type="spellEnd"/>
<w:r w:rsidR="0000124E">
<w:t xml:space="preserve"> package</w:t>
</w:r>
<w:r>
<w:t>.</w:t>
</w:r>
</w:p>
The paragraph type with getWordStyles returns pPr styles and pStyle styles. For example:
$referenceNode = array(
'type' => 'paragraph',
'contains' => 'One',
);
$contents = $docx->getWordStyles($referenceNode);
returns the information (pPr and pStyle styles) from the paragraph that contains "One":
<w:p w:rsidR="007B3611" w:rsidRDefault="007B3611" w:rsidP="007B3611">
<w:pPr>
<w:pStyle w:val="ListParagraph"/>
<w:numPr>
<w:ilvl w:val="0"/>
<w:numId w:val="1"/>
</w:numPr>
</w:pPr>
<w:r>
<w:t>One</w:t>
</w:r>
</w:p>
On https://www.phpdocx.com/documentation/snippets/get-font-size-content you can read a sample to get the font size of a content (document defaults using Indexer, default paragraph and character styles using getWordStyles, and specific styles using getWordStyles).
Regards.