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Hello,

You can use the styleName option to set the custom paragraph style to be applied to the caption. This custom style (styleId value) must exist in the template or it can also be generated with phpdocx.

For example, using a custom paragraph style generated with createParagraphStyle applied to image and table captions:

// style options
$style = array(
    'color'            => '999999',
    'border'           => 'single',
    'borderLeft'       => 'double',
    'borderRightColor' => '000099',
    'indentLeft'       => 920,
);
// create custom style
$docx->createParagraphStyle('myStyle', $style);

$options = array(
    'src' => 'image.png',
    'imageAlign' => 'center',
    'scaling' => 50,
    'spacingTop' => 10,
    'spacingBottom' => 0,
    'spacingLeft' => 0,
    'spacingRight' => 20,
    'textWrap' => 0,
    'borderStyle' => 'lgDash',
    'borderWidth' => 6,
    'borderColor' => 'FF0000',
    'caption' => array('showLabel' => true, 'text' => ' Sample Image', 'styleName' => 'myStyle', 'bookmarkName' => 'my_bookmark'),
);

$docx->addImage($options);

$valuesTable = array(
    array(11, 12, 13, 14),
    array(21, 22, 23, 24),
    array(31, 32, 33, 34),
);

$paramsTable = array(
    'border' => 'single',
    'tableAlign' => 'center',
    'borderWidth' => 10,
    'borderColor' => 'B70000',
    'textProperties' => array('bold' => true, 'font' => 'Algerian', 'fontSize' => 18),
    'caption' => array('text' => ' Sample Table', 'styleName' => 'myStyle')
);

$docx->addTable($valuesTable, $paramsTable);

If you don't know the style ID to be set please use Indexer or parseStyles or getWordStyles to know the available style IDs.

Regards.