Question

I seem to be having a problem checking if a string exists in my array. There is probably a really obvious answer to my question do forgive me but I’m new to PHP.

Anyway here is my code:

while($row = mysql_fetch_assoc($result))
{
    $result_array[] = $row;
}

if (in_array("496891", $result_array)) 
{
echo "true";
}
else
{
echo "false";
}

The array looks like this:

Array ( [0] => Array ( [ID] => 496891 ) [1] => Array ( [ID] => 1177953 )) 

My code always echoes false. Anyone know what I’m doing wrong?

Thanks

Answer 1

You have a nested array and must check against each item like so:

function in_multidimensional_array($val, $array) {
  foreach($array as $key => $value) {
     if (in_array($val, $array[$key])) {
        return true;
     }  
  }
  return false;
}

Now you can check if the value 496891 exists using:

if(in_multidimensional_array('496891', $result_array)) {
   print 'true';
} else {
   print 'false';
}