Question

I try to validate fields. Three fields that may only contain numbers. The fields have the variable names $num1, $num2, $num3. I have put them in an array and then I run preg_match but it does not work. How should I do?

$valnum = array (‘$num1’, ‘$num2’, ‘$num3’);
    if (preg_match('/[0-9]/', $valnum)){
echo $mycost;
}
    else {
echo 'You can only enter numbers';  
    }

Answer 1

   is_numeric() 

would be a better approach

//worked up example:

<?php
$num1 = '1';
$num2 = '11';
$num3 = '11.11';

$mycost = '$99.99';

$valnum = array($num1,$num2,$num3);
$check = '';
foreach($valnum as $element){
    if(!is_numeric($element)){
        $check = 'bad';
        break;
    }
}

if($check=='bad'){
    echo 'You can only enter numbers';
}else{
    echo $mycost;
}

?>

returns 99.99