In urgent PHP, how can I determine whether checkbox is selected?

Urgent !! In PHP, how do I determine whether checkbox is selected? In PHP, how does one determine whether the checkbox is selected ?, If the obtained value is not blank, it is selected & lt; inputtype = & quot; checkbox & quot; name = & quot; select [] & quot; value = & quot; 1 & quot;/& gt; & lt; input urgent !! In PHP, how do I determine whether checkbox is selected?
In PHP, how does one determine whether the checkbox is selected?

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The obtained value is selected if it is not empty.






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Check.html:

Checkbox. php:
If ($ _ POST)
{If ($ _ POST ['select']! = "") {Echo "not blank";} else {echo "blank ";}}
?>
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You can use JS to determine first, as shown in figure
If (form. checkname. checked ){}
If there are multiple, you can use a JS loop to submit the check value as a string, or use the 4-floor method.
Submit to the php page and judge again .:-)
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PHP cannot judge. The value can only be determined after the form is submitted.
The client JS can be used for judgment.
Checks whether his checked is true.