First you have to understand the flow :
PHPWord -> document.docx -> Microsoft Word -> document.pdf -> Adobe Reader
I create some tables in a .docx document with PHPWord :
private const CS_BORDER =
[
'borderSize' => 7,
'borderColor' => '000000',
];
$table = $section->addTable();
$row = $table->addRow();
$cell = $row->addCell(Font::centimeterSizeToTwips(5.3), self::CS_BORDER);
$cell->addText('Text', self::FS_CALIBRI_10_BOLD, self::PS_CENTER_ALIGN_NO_SPACE);
$cell = $row->addCell(Font::centimeterSizeToTwips(2.2), self::CS_BORDER);
$cell->addText('Text', self::FS_CALIBRI_10_BOLD, self::PS_CENTER_ALIGN_NO_SPACE);
$cell = $row->addCell(Font::centimeterSizeToTwips(2.4), self::CS_BORDER);
$cell->addText('Text', self::FS_CALIBRI_10_BOLD, self::PS_CENTER_ALIGN_NO_SPACE);
Then I manually export .docx to .pdf using Microsoft Word and opening it with Adobe Reader.
Like a lot of peoples I get render issues because of "Enhance thin line" setting in Adobe Reader.
The point is : lines are optimized even if I use following code :
private const CS_BORDER =
[
'borderSize' => 50,
'borderColor' => '000000',
];
My question is : Is there something to do in PHPWord to make Adobe Reader don't treats borders as thin line ?
In my experience, the way to prevent Acrobat or Reader from its excessive bolding of rectangles is to insert additional anchor points on all straight lines of the shape. I do this in Adobe Illustrator, then export to EMF for use in Word. You'll have to investigate whether phpword can edit vectors at that level of detail.