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  • PDF_info_textline()

    (PECL pdflib >= 2.1.0)

    Perform textline formatting and query metrics

    说明

    PDF_info_textline(resource $pdfdoc,string $text,string $keyword,string $optlist):float

    Performs textline formatting and queries the resulting metrics.

    You can use PDF_info_textline to center some text in the page.
    Here's a little function
    <?php
    // Parameters:
    // $p -> the PDF handle
    // $text -> the text to center
    // $posy -> the vertical position of the text
    // $pageWidth -> the width of the page, defaults to 595 (A4)
    function center_text($p, $text, $posy, $pageWidth=595)
      {
      $width = PDF_info_textline($p, $text, 'width', '');
      PDF_fit_textline($p, $text, ($pageWidth-$width)/2, $posy, '');
    }
    ?>