PHP a lot of else if another approach?

Question

Here is my code I wanted to ask if there is a better way to do this? I'm going to need more "else if" options and I'm worried about performance

if($_GET['begin'] === 'yeg'){

} else if ($_GET['begin'] === 'deda') {

} else if ($_GET['begin'] === 'beara') {

} else if ($_GET['begin'] === 'eima') {

} else if ($_GET['begin'] === 'aba') {

}

Have a look at : http://php.net/manual/en/control-structures.switch.php — , Jul 25 '14 at 09:59
Performance is very much increased in a switch statement as @caCtus linked, as the variable gets evaluated only once and then compared, saving memory and clock cycles. — t3chguy, Jul 25 '14 at 10:00
@t3chguy "Performance is _very much_ increased" do you have any benchmarks to suggest that? I don't see how this could be the bottleneck in anything but the most trivial of applications. — Tom Fenech, Jul 25 '14 at 10:02
@TomFenech Agreed, it's likely a very minor performance increase at best. Premature optimisation springs to mind here. — naththedeveloper, Jul 25 '14 at 10:05
bad choice of wording on my part, the increase isn't substantial, maybe after a few hundred ElseIf statements, and in low amounts the ElseIf statements are actually faster. — t3chguy, Jul 25 '14 at 10:07

score 10 · Accepted Answer · edited May 23 '17 at 12:20

You should use switch statement instead. A switch construct is more easily translated into a jump (or branch) table. This can make switch statements much more efficient than if-else when the case labels are close together. The idea is to place a bunch of jump instructions sequentially in memory and then add the value to the program counter. This replaces a sequence of comparison instructions with an add operation. - @Judge Maygarden Why the switch statement and not if-else?

$begin = $_GET['begin'];

switch ($begin):

case 'yeg':
   //do something
   break;

case 'deda':
   //do something
   break;

case 'beara':
   //do something
   break;

case 'eima':
   //do something
   break;

case 'aba':
   //do something
   break;

endswitch;

score 0 · Answer 2 · answered Jul 25 '14 at 10:02

0

You can try to use a switch statement instead:

switch ($_GET['begin']) {
    case 'yeg':
        break;

    case 'deda':
        break;

    // Yada yada, continue like this as much as needed.
}

answered Jul 25 '14 at 10:02

Gladen

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PHP a lot of else if another approach?

2 Answers2