php checking array for number

Question

Whats the easiest and quickest way to loop through an array of numbers and find out if $val is in there?

Say my array is $numbers(3,5,78,35,78) and my $val=5, it would return true.

Both goleztrol and clive have the right answers. in_array is a simple true/false, while array_search returns the corresponding key if the value is found. Whichever of the two you use depends on what you need to do. — Marc B
– Marc B, Commented Oct 31, 2011 at 20:54
@MarcB In this case in_array is the best. I thought of it only after posting array_search, but since Clive suggested in_array as well by that time, I removed my answer. — GolezTrol
– GolezTrol, Commented Oct 31, 2011 at 20:57
@Golez: in_array() is basically array_search(..) !== FALSE. — Marc B
– Marc B, Commented Oct 31, 2011 at 20:59

Clive · Accepted Answer · 2011-10-31 20:53:01Z

10

if (in_array($val, $numbers)) {
  // Do something
}

No looping required

answered Oct 31, 2011 at 20:53

Clive

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2 Comments

What would be the correct syntax for: if (($key == "red") && (in_array($val, $numbers)))

Do you mean if "red" is a key of the array? If so just extend it with array_keys: if (in_array("red", array_keys($arr))) { ...

professorsloth · Accepted Answer · 2011-10-31 20:54:30Z

1

If you don't care about the position of your number, you could use in_array()

answered Oct 31, 2011 at 20:54

professorsloth

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