Basic - If statement for a set of values

Question

I have:

if($tha==1||$tha==2||$tha==3...){
echo 'correct';
}

$tha is a value from 1 to 10000, randomly chosen.

If it is the same as one of the number to check against, then echo.

I have the numbers to check against stored in a array if needed called $thaArray. The count() on this array is 500.

Is there a way to make the if statement without typing all the elements I need to check against individually like above?

every time you are dealing with an array, a word **"loop"** should be blazing in your mind. — Your Common Sense, Dec 06 '11 at 12:47
Can you put the numbers to check against in another array? If you can, just use if (count(array_diff(array1, array2)) > 0 ) — Aurelio De Rosa, Dec 06 '11 at 12:48
@Anzeo they don't like such links here :) It is more like a nursery actually here rather than programmers collaboration site — Your Common Sense, Dec 06 '11 at 12:54
possible duplicate of [php - find if an array contains an element](http://stackoverflow.com/questions/3416614/php-find-if-an-array-contains-an-element) — kapa, Dec 06 '11 at 13:10

score 1 · Answer 1 · edited May 05 '17 at 19:07

in_array() will tell you whether a certain value can be found in an array.

$thaArray = array(1, 2, 3);
if (in_array($tha, $thaArray)) {
    ...
}

RTM Note:

Please try to familiarize yourself with the PHP manual. If you are working with an array, and you need a certain function, you have a great chance of finding it in the Array Functions page.

Other handy tools:

StackOverflow - with one search you could find hundreds of similar questions with the same answer(s)

score 1 · Answer 2 · answered Dec 06 '11 at 12:47

1

Look at in_array:

if(in_array($tha, $thaArray)) echo 'correct';

answered Dec 06 '11 at 12:47

steveo225

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score 1 · Accepted Answer · answered Dec 06 '11 at 12:48

1

Put the numbers to check in an array and use in_array:

$primes = array(2, 3, 5, 7, 11, 13);
if (in_array($tha, $primes)) {
  echo 'correct';
}

answered Dec 06 '11 at 12:48

SteeveDroz

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score 0 · Answer 4 · answered Dec 06 '11 at 12:48

0

$numbers = range(1,500);
if (in_array($tha, $numbers))
{
   echo 'correct';
}

answered Dec 06 '11 at 12:48

matino

17,199
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score 0 · Answer 5 · answered Dec 06 '11 at 12:49

0

Yes, you should use the in_array() function. Your problem would be solved by:

<?php
if(in_array($tha, $thaArray)) {
    echo 'correct';
}
?>

That would do the desired..

answered Dec 06 '11 at 12:49

stefandoorn

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Basic - If statement for a set of values

5 Answers5