How can you ensure that a specific database field is only output once in a PHP loop?

To ensure that a specific database field is only output once in a PHP loop, you can keep track of the values that have already been output using an array. Before outputting the field, check if the value has already been outputted, and if not, output it and add it to the array. This way, duplicate values will not be displayed. 

// Sample code to output a specific database field only once in a loop

$uniqueValues = array(); // Array to store unique values

// Loop through database results
foreach ($results as $row) {
    $fieldValue = $row['specific_field'];

    // Check if the field value has already been outputted
    if (!in_array($fieldValue, $uniqueValues)) {
        echo $fieldValue . "<br>";
        $uniqueValues[] = $fieldValue; // Add value to unique values array
    }
}

Keywords

PHP loop database field unique output conditional statement

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