PHP method to determine whether the data from the FORM form or URL parameter is an integer, formurl_PHP tutorial

PHP method to determine whether the data from the FORM form or URL parameters is an integer, formurl

PHP determines whether the data from the FORM form or URL parameters is an integer, the is_int function is for FORM There is no way to determine whether the data coming from the form or URL parameters is an integer, because the data coming from the FORM is a string.
Use is_numeric to determine whether it is a numeric type, and then determine whether there is a decimal point to determine whether it is an integer

if(!is_numeric($page)||strpos($page,".")!==false){
echo "不是整数";
}else{
echo "是整数";
}

Sometimes we need a method to determine whether the id is a number:

How to judge numbers in dedecms

$cid = empty($cid)? 1 : intval(preg_replace("/[^-\d]+[^\d]/",'', $cid));

It is recommended that you filter the key parameters. Such as digital regular filtering
Copy code The code is as follows:
if(preg_match("/^d*$/",$fgid)) echo('is a number');
else echo('not a number');

Or use function
Copy code The code is as follows:
if(is_numeric($fgid)) echo('is a number');
else echo('not a number');

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