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Asked: 2026-06-12T09:09:26+00:00

Possible Duplicate: !in_array use in PHP – conditional statments I have this code that

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Possible Duplicate:
!in_array use in PHP – conditional statments

I have this code that is doing opposite.

Let’s assume I have array of 1,2,3,3,4,5

while ($row = mysql_fetch_assoc($result)) {

    $item = $row['item'];
    echo $item . '<br />'; // for testing
    $items[] = $row['item'];
    if (!in_array($item, $items)) {

        $output[] = $row;

        foreach ($items as $item) {
            echo 'Array thus far: ' . $item . '<br />';  // for testing
        }
    } 

}

Basically I want the array to not have duplicates. The test code should eventually print out 1,2,3,4,5.. but it actually print out 1,2,3,3,4,5 the in_array() function doesnt seem to work here with a varible?

Here is real output:

Avengers
Array thus far: Avengers
Avengers
Array thus far: Avengers
Array thus far: Avengers
American Dad!
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
American Dad!
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Christopher Columbus
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Avatar
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Kung Pao Chicken
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
The Brak Show
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Avengers
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
The Brak Show
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
Array thus far: The Brak Show
Space Ghost: Coast to Coast
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
Array thus far: The Brak Show
Array thus far: Space Ghost: Coast to Coast
Battlestar Galactica (2004)
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
Array thus far: The Brak Show
Array thus far: Space Ghost: Coast to Coast
Array thus far: Battlestar Galactica (2004)
Potstickers
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
Array thus far: The Brak Show
Array thus far: Space Ghost: Coast to Coast
Array thus far: Battlestar Galactica (2004)
Array thus far: Potstickers
Potstickers
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
Array thus far: The Brak Show
Array thus far: Space Ghost: Coast to Coast
Array thus far: Battlestar Galactica (2004)
Array thus far: Potstickers
Array thus far: Potstickers
Avatar
Array thus far: Avengers
Array thus far: Avengers
Array thus far: American Dad!
Array thus far: American Dad!
Array thus far: Christopher Columbus
Array thus far: Avatar
Array thus far: Kung Pao Chicken
Array thus far: The Brak Show
Array thus far: Avengers
Array thus far: The Brak Show
Array thus far: Space Ghost: Coast to Coast
Array thus far: Battlestar Galactica (2004)
Array thus far: Potstickers
Array thus far: Potstickers
Array thus far: Avatar

There are repeat items in here I am trying to keep out of array.

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1 Answer

  1. Editorial Team

    You need to push $row['item'] onto $items after you do the in_array():

    while ($row = mysql_fetch_assoc($result)) {
    $item = $row['item'];
    echo $item . '<br />'; // for testing
    if (!in_array($item, $items)) {
        $output[] = $row;
        foreach ($items as $item) {
            echo 'Array thus far: ' . $item . '<br />';  // for testing
        }
        $items[] = $row['item'];
    }
}

    Or you can simplify it by removing $items: 

    while ($row = mysql_fetch_assoc($result)) {
    $item = $row['item'];
    echo $item . '<br />'; // for testing
    if (!in_array($item, $output)) {
        $output[] = $row;
        foreach ($items as $item) {
            echo 'Array thus far: ' . $item . '<br />';  // for testing
        }
    }
}
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