function isAnd($var, $value, $operator = '==')
{
    if(isset($var) && $var $operator $value)
        return true;
}

if(isAnd(1, 1, '===')) echo 'worked';

class compare
{
  function is($op1,$op2,$c)
  {
     $meth = array('===' => 'type_equal', '<' => 'less_than');
     if($method = $meth[$c]) {
        return $this->$method($op1,$op2);
     }
     return null; // or throw excp.
  }
  function type_equal($op1,$op2)
  {
      return $op1 === $op2;
  }
  function less_than($op1,$op2)
  {
      return $op1 < $op2;
  }
}

function num_cond ($var1, $op, $var2) {

    switch ($op) {
        case "=":  return $var1 == $var2;
        case "!=": return $var1 != $var2;
        case ">=": return $var1 >= $var2;
        case "<=": return $var1 <= $var2;
        case ">":  return $var1 >  $var2;
        case "<":  return $var1 <  $var2;
    default:       return true;
    }
}

$ops = array( "=", "!=", ">=", "<=", ">", "<" );
$v1 = 1; $v2 = 5;

foreach ($ops as $op) {
    if (num_cond($v1, $op, $v2)) echo "True  ($v1 $op $v2)n"; else echo "False ($v1 $op $v2)n";
}

function isAnd($var, $value, $operator = '==') {
    return isset($var) && $var $operator $value;
}

isAnd($foo, 1, '===');

isset($foo) && isAnd($foo, 1, '===');

if(isset($var) && eval("return $var $operator $value"))
    return true;

trait DynamicComparisons{

private $operatorToMethodTranslation = [
    '=='  => 'equal',
    '===' => 'totallyEqual',
    '!='  => 'notEqual',
    '>'   => 'greaterThan',
    '<'   => 'lessThan',
];

protected function is($value_a, $operation, $value_b){

    if($method = $this->operatorToMethodTranslation[$operation]){
        return $this->$method($value_a, $value_b);
    }

    throw new Exception('Unknown Dynamic Operator.');
}

private function equal($value_a, $value_b){
    return $value_a == $value_b;
}

private function totallyEqual($value_a, $value_b){
    return $value_a === $value_b;
}

private function notEqual($value_a, $value_b){
    return $value_a != $value_b;
}

private function greaterThan($value_a, $value_b){
    return $value_a > $value_b;
}

private function lessThan($value_a, $value_b){
    return $value_a < $value_b;
}

private function greaterThanOrEqual($value_a, $value_b){
    return $value_a >= $value_b;
}

private function lessThanOrEqual($value_a, $value_b){
    return $value_a <= $value_b;
}

}

function is_equal($a, $b) {
  return $a==$b;
}
function is_same($a, $b) {
  return $a===$b;
}
function is_greater_than($a, $b)
....

$compare='is_equal';
if ($compare($a, $b)) {
   ....

$b = 10;
$c = '+';
$p = $a . $c. $b; // Forming a String equation
$p = eval('return '.$p.';'); // Evaluating the Equation
echo $p;

15

$b = 10;
$c = '==';
$p = $a . $c. $b;
$p = eval('return '.$p.';');
echo $p;

false