PHP4 practical application experience Article 9

Author: Sun motion "" operator ---------------------- As we mentioned above, PHP4 adds a new operator to test whether the variable has the same type. Here is an example: ----------------------------------------------------- Syn

Author: Sun Sports
"=" Operator
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As mentioned above, a new = operator is added to PHP4 to test whether the variable has the same type. Here is an example:
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<?
If (! $ Submit)
{
// If $ submit does not exist, it indicates that the form has not been submitted.
// Display the first page
?>
<Html>
<Head>
<Style type = "text/css">
Td {font-family: Arial ;}
</Style>
</Head>
<Body>
<Form method = "GET" action = "cookie. php">
<Table cellspacing = "5" cellpadding = "5" border = "0>
<Tr>
<Td align = "center">
Enter any numeric value or data
</Td>
<Td align = "right">
<Input type = "text" name = "yin">
</Td>
</Tr>
<Tr>
<Td align = "center">
Enter another value or data.
</Td>
<Td align = "right">
<Input type = "text" name = "yang">