How to implement print preview function in php

php method to implement the print preview function: first get the html code of the current page; then set the printing start area and printing end area; then fetch the html from the start and end codes backward; it is best to determine the content to be printed That’s it.

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php realizes the print preview function

<inputid="btnPrint" type="button" value="打印"onclick="javascript:window.print();" />
<inputid="btnPrint" type="button" value="打印预览" onclick=preview(1)/>
<styletype="text/css" media=print>
.noprint{display : none}
</style>
<pclass="noprint">不须要打印的地方</p>
<script>
functionpreview(oper)
{
if (oper <10)
{
bdhtml=window.document.body.innerHTML;//获取当前页的html代码
sprnstr="<!–startprint"+oper+"–>";//设置打印開始区域
eprnstr="<!–endprint"+oper+"–>";//设置打印结束区域
prnhtml=bdhtml.substring(bdhtml.indexOf(sprnstr)+18);//从開始代码向后取html
prnhtmlprnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));//从结束代码向前取html
window.document.body.innerHTML=prnhtml;
window.print();
window.document.body.innerHTML=bdhtml;
} else {
window.print();
}
}
</script>
<p>XXXXX</p>
<!–startprint1–>要打印的内容<!–endprint1–>
<inputid="btnPrint" type="button" value="打印"onclick="javascript:window.print();" />
<inputid="btnPrint" type="button" value="打印预览" onclick=preview(1)/>
<styletype="text/css" media=print>
.noprint{display : none}
</style>
<pclass="noprint">不须要打印的地方</p>
<script>
functionpreview(oper)
{
if (oper <10)
{
bdhtml=window.document.body.innerHTML;//获取当前页的html代码
sprnstr="<!–startprint"+oper+"–>";//设置打印開始区域
eprnstr="<!–endprint"+oper+"–>";//设置打印结束区域
prnhtml=bdhtml.substring(bdhtml.indexOf(sprnstr)+18);//从開始代码向后取html
prnhtmlprnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));//从结束代码向前取html
window.document.body.innerHTML=prnhtml;
window.print();
window.document.body.innerHTML=bdhtml;
} else {
window.print();
}
}
</script>
<p>XXXXX</p>
<!–startprint1–>要打印的内容<!–endprint1–>

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