本文介绍了如何在PHP中使用PDFlib TET提取PDF中的文本：
/* 全局参数表*/
$globaloptlist = "searchpath=../../../resource/cmap";
/* 文档参数表 */
$docoptlist = "";
/* 页面参数表 */
$pageoptlist = "granularity=page";
$infile = $_GET['infile'];
/* 将提取出的文本以UTF-8 编码传送的浏览器 */
header("Content-type: text/html; charset=UTF-8");
print("
");
$tet = TET_new();
if ($infile == "")
{
die("usage:add ?infile=filename.pdf to the URL/n");
}
TET_set_option($tet, $globaloptlist);
$doc = TET_open_document($tet, $infile, $docoptlist);
if ($doc == -1)
{
die("Error ". TET_get_errnum($tet) . " in " . TET_get_apiname($tet)
. "(): " . TET_get_errmsg($tet) . "/n");
}
/* 获取文档的页数*/
$n_pages = TET_pcos_get_number($tet, $doc, "length:pages");
for ($pageno = 1; $pageno <= $n_pages; ++$pageno) /* 逐页循环*/
{
$page = TET_open_page($tet, $doc, $pageno, $pageoptlist);
if ($page == -1)
{
print("Error " . TET_get_errnum($tet) . "in " .
TET_get_apiname($tet) . "() on page " . $pageno . ": " . TET_get_errmsg($tet) . "/n");
continue;
}
/* 提取所有的文本段 */
while (($text = TET_get_text($tet, $page)) != "")
{
/* 遍历所有字符*/
while (($ci = TET_get_char_info($tet, $page)))
{
/* 提取字体名称;字符位置可以通过ci->x和ci->y取得*/
$fontname = TET_pcos_get_string($tet, $doc,"fonts[" . $ci->fontid . "]/name");
}
print($text);
}
if (TET_get_errnum($tet) != 0)
{
print("Error " . TET_get_errnum($tet) . " in " . TET_get_apiname($tet) . " on page " . $pageno . ": " . TET_get_errmsg($tet) . "/n");
}
TET_close_page($tet, $page);
print("/n
"); /* add a delimiter between each zone */
}
print("
");
TET_close_document($tet, $doc);
TET_delete($tet);
?>
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