如何退出if语句并继续执行else

Question

This is a long shot question, but is there a way in php to exit an "if" statement and continue on to the "else" statement if an error occurs inside the if block?

example

if ($condition == "good")
{
//do method one

//error occurs during method one, need to exit and continue to else 

}

else 
{
//do method two
}

Of course it is possible to do a nested if inside the first if, but that seems hacky.

TIA

Answer 1

try {
    //do method one

    //error occurs during method one, need to exit and continue to else 
    if ($condition != "good") {
        throw new Exception('foo');
    }
} catch (Exception $e) {
    //do method two

}

Answer 2

I would just use a function so you don't duplicate code:

if ($condition == "good") {
    //do method one
    //error occurs during method one
    if($error == true) {
        elsefunction();
    }
} else {
    elsefunction();
}

function elsefunction() {
    //else code here
}

Answer 3

Should that be possible? Anyway you might consider changing it to.

$error = "";
if ($condition == "good") {
 if (/*errorhappens*/) { $error = "somerror"; }
}
if (($condition != "good") || ($error != "") ) {
 //dostuff
}

Answer 4

You could modify methodOne() such that it returns true on success and false on error:

if($condition == "good" && methodOne()){
  // Both $condition == "good" and methodOne() returned true
}else{
  // Either $condition != "good" or methodOne() returned false
}

Answer 5

Assuming that methodOne returns false on error :

if !($condition == "good" && methodOne())
{
//do method two
}

Answer 6

you really need this? i think no... but you can hack..

do{

   $repeat = false;

   if ($condition == "good")
   {
      //do method one
      $condition = "bad";
      $repeat = true;

    }    
    else 
    {
       //do method two
    }

}while( $ok ) ;

I advise on methods to separate...

Answer 7

I find using switches instead of if...else are handy for doing this: Omitting a break statement makes the switch fall through to the next case:

switch ($condition) {
case 'good':
    try {
        // method to handle good case.
        break;
    }
    catch (Exception $e) {
        // method to handle exception
        // No break, so switch continues to default case.
    }
default:
    // 'else' method
    // got here if condition wasn't good, or good method failed.
}

Answer 8

if ($condition == "good") {
    try{
        method_1();
    }
    catch(Exception $e){
       method_2();
    }
} 
else {
    method_2();
}

function method_2(){
   //some statement
}