Looping through an array for conditional branching

[trufla]

Hiya!

Pretty new to php and I am trying to fathom the whole looping through an array thing. Unfortnately my book does'nt answer questions. Could someone help?

I have a an array called $PetTreatment holding 5 values like so:

$PetTreatment[] = "LeuJab"; 
$PetTreatment[] = "FluJab"; 
$PetTreatment[] = "Worm"; 
$PetTreatment[] = "Flea";
$PetTreatment[] = "NeuJab"; 

echo "<p>Your Pets treatments are:</p>"; 

foreach ($PetTreatment as $treatments){ 
echo "<p>$treatments</p>";
}

I can echo out the name of the treatments working through a foreach loop, and $treatments temporarily holds each value stored array for the time that the loop is looping.

The problem I have is I want to compare a number of these values at once. So if, for instance there are some variables like this:

$Flu = "FluJab"; 
$Leu = "LeuJab";
$Neu = "NeuJab"; 
$Flea = "Flea"; 
$Worm = "Worm";

I can compare all the values in the array at once with each of the variable values specified above. For example:

If ($treatments == $Flu and 
    $treatments == $Leu and 
    $treatments == $Neu and 
    $treatments == $Flea and 
    $treatments == $Worm){ 
    echo "You have all the treatments necessary!"; 

}

Can't seem to get my head around this.

Obviously all the values are there in the array, but only one is output at a time, and I cannot figure out how to check the contents of the array as a whole.

Can someone help?

[thorpe]

The easiest way would be to use the [man]in_array/man function.

if (in_array(array($Flu,$Leu,$Neu,$Flea,$Worm),$PetTreatment)
    echo "You have all the treatments necessary!";

[trufla]

Thanks for that thrope!

And sorry to be thick.......but the little program returns false, even though all the values are there.

$PetTreatment[] = "FluJab";
$PetTreatment[] = "LeuJab";
$PetTreatment[] = "NeuJab";
$PetTreatment[] = "Flea";
$PetTreatment[] = "Worm";


$Flu = "FluJab";
$Leu = "LeuJab";
$Neu = "NeuJab";
$Flea = "Flea";
$Worm = "Worm";


if (in_array(array($Flu,$Leu,$Neu,$Flea,$Worm), $PetTreatment)){

echo "You have all the treatments necessary!";
}


     else { echo "You do not have all the treatments!";

           }

Do you know what I did wrong?

Cheers!

trufla

[thorpe]

I think I may have misinterpreted [man]in_array/man. Im sure there is a better way, but this is working.

$PetTreatment[] = "FluJab";
$PetTreatment[] = "LeuJab";
$PetTreatment[] = "NeuJab";
$PetTreatment[] = "Flea";
$PetTreatment[] = "Worm";
$correct = 0;
foreach ($PetTreatment as $val) {
  switch ($val) {
    case "FluJab": $correct++; break;
    case "LeuJab": $correct++; break;
    case "NeuJab": $correct++; break;
    case "Flea"  : $correct++; break;
    case "Worm"  : $correct++; break;
  }
}
if ($correct == 5) {
    echo "You have all the treatments necessary!";
} else {
    echo "You do not have all the treatments!";
}

[Installer]

Here's another way to look at it. It's kind of contrived, and maybe what it does isn't what you're trying to do, but maybe at the least it will help you understand the foreach.

// The status values (true, false) would be generated dynamically,
// e.g. from user input or from a database.
// An array is a collection, so we use a plural variable name.
$treatment_statuses = array('LeuJab' => true,
                            'FluJab' => true,
                            'Worm'   => true,
                            'Flea'   => false,
                            'NeuJab' => true);

echo '<p>Your Pets treatments are:</p>'; 
// Now that the treatments and statuses are in one array,
// we need only to loop through that array to get our display.
// "$all_given" starts out true. If one or more treatments is false,
// it will be set to false and stay that way.
// Each array element is one item, so we use singular variable names.
$all_given = true;
foreach ($treatment_statuses as $treatment => $status) { 
    echo '<p>' . $treatment . ': ';
    if ($status) {
        echo 'Given.</p>';
    } else {
        echo 'Not given.</p>';
        $all_given = false;
    }
}

// Now we can check "$all_given".
if ($all_given) {
    echo '<p>All treatments given.</p>';
} else {
    echo '<p>Some treatements not given.</p>';

[trufla]

cheers chaps!

This helps!

[bradgrafelman]

Can you make the required treatments into an array?

$PetTreatment[] = "FluJab";
$PetTreatment[] = "LeuJab";
$PetTreatment[] = "NeuJab";
$PetTreatment[] = "Flea";
$PetTreatment[] = "Worm";


$required = array("FluJab", "LeuJab", "NeuJab", "Flea", "Worm");

$error = FALSE;
foreach($required as $item)
     if(!in_array($item, $PetTreatment)) {
          echo 'One or more treatments not given.';
          $error = TRUE;
          break;
     }

if(!$error)
     echo 'All treatments given';

With some modification, you could even build a list of the treatments not given and echo those out.

[Installer]

Last I looked the code I posted did both those things.