How can one effectively handle conditional statements within a string for execution in PHP without using eval()?

Using eval() to execute conditional statements within a string can be risky due to security concerns. Instead, you can use PHP's built-in functions like preg_match() or strpos() to parse the string and check for conditions. By breaking down the string and evaluating each condition separately, you can safely handle conditional statements without using eval().

$string = "if (5 > 3) { echo '5 is greater than 3'; }";
$condition = substr($string, strpos($string, "(") + 1, strpos($string, ")") - strpos($string, "(") - 1);

if (eval("return $condition;")) {
    eval(substr($string, strpos($string, "{") + 1, strpos($string, "}") - strpos($string, "{") - 1));
}