Made a Function_PHP tutorial to detect whether the transmitted parameter is a number

/*Determine whether the transmitted data is a number
Use regular expressions to determine whether the entered number is legal
Call: checknum (parameter 1, parameter 2)

*/

Copy code The code is as follows:

function checknum($id,$say)
{
$inid=$id;
if(! ereg("^(-{0,1}|+{0,1})[0-9]+(.{0,1}[0-9]+)$",$inid)) 
   {
echo $say.", entrance: "."".$inid."";
exit;
} }
}

Call

Copy code The code is as follows:

$tid="111fff";
checknum($tid,"Illegal number")
?>

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