A hyperlink under a php webpage is a pdf document. how can this problem be achieved.

A hyperlink on the php webpage is a pdf document. how can this problem be achieved... I want to add a hyperlink to a pdf document on a php webpage and click it to view the pdf content. how can I achieve this? Please help ., If AdobeReader is installed, you can click the link to open it directly. Otherwise, you need to install the flash plug-in. However, it seems that you have to make a hyperlink on the paid php webpage, which is a pdf document, how can this problem be achieved...
I want to add a hyperlink to a pdf document on a php webpage and click it to view the pdf content. how can I achieve this? Please help.

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Once Adobe Reader is installed, click the link to open it directly.
Otherwise, you need to install the flash plug-in, but it seems that you have to pay for it.
Ability to do one by yourself
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Remember to try searching for PDFLIB in PDF...
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I am also working on this recently,

Is it http://www.a744.com/fileview_1942.html?

You can first convert swftools to swf, and then use flexpaper to display