在php中检测字符串中的第一个零

Question

function number_check($int){
    if($int>0 && !is_float($int)){return TRUE;}
    else{return FALSE;}
}

$var="025";

if(number_check($var)){echo "pass";}else{echo "fail";}

I have make a function to check the number for post id.

post_id should always > 0 and no decimal.

but I have a problem when user try to enter 000243, if user put zero at front, it return true.

Is any way to solve this?

Answer 1

I think checking $int{0} != 0 will solve what you are trying to achieve :

function number_check($int){
    if ( $int > 0 && !is_float($int) && $int{0} != 0 ) {
        return TRUE;
    }
    else {
        return FALSE;
    }
}

$var="023";

if ( number_check($var) ) {
    echo "pass";
} else {
    echo "fail";
}

Check this DEMO