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Php small function details

Source: Internet
Author: User
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<? Php
$ Dy = $ _ POST ["dy"];
$ De = $ _ POST ["de"];
$ Jsf = $ _ POST ["select"];
$ Qingkong = $ _ POST ["qingkong"];
$ Submit = $ _ POST ["Submit"];

If ($ jsf = "jia "){
$ Zhi = $ dy + $ de;
$ Zhi = "Your calculation result is: $ zhi ";
}
If ($ jsf = "jian "){
$ Zhi = $ dy-$ de;
$ Zhi = "Your calculation result is: $ zhi ";
}
If ($ jsf = "chen "){
$ Zhi = $ dy * $ de;
$ Zhi = "Your calculation result is: $ zhi ";
}
If ($ jsf = "chu "){
If ($ de = "0 "){
$ Zhi = "the divisor cannot be 0. enter a valid number! ";
} Else {
$ Zhi = $ dy/$ de;
$ Zhi = "Your calculation result is: $ zhi ";
}
}
If ($ jsf = "yu "){
If ($ de = "0 "){
$ Zhi = "the remainder cannot be 0 ";
} Else {
$ Zhi = $ dy % $ de;
}
}

If ($ qingkong = "empty "){
Unset ($ dy, $ de, $ zhi );
}

?>

<Html>
<Head> <title> counter </title> <Body>
<Form method = "post" action = "">
<Table border = "1">
<Caption align = "center"> simple calculator </caption>
<Tr>
<Td height = "75">
<Input type = "text" value = "<? Php echo $ dy;?> "Name =" dy "/>
</Td>
<Td>
<Select name = "select">
<Option value = "jia"> + </option>
<Option value = "jian">-</option>
<Option value = "chen"> * </option>
<Option value = "chu">/</option>
<Option value = "yu" >%</option>
</Select>
</Td>
<Td>
<Input type = "text" value = "<? Php echo $ de;?> "Name =" de "/>
</Td>
<Td>
<Input type = "submit" name = "Submit" value = "submit"/>
<Input type = "submit" name = "qingkong" value = "empty"/>
</Td>
</Tr>
<Tr>
<Td height = "23" colspan = "4"> <? Php echo $ zhi;?> </Td>
</Tr>
</Table>
</Form>
</Body>
</Html>



From battlefield diaries _ LAMP brothers

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