In PHP, what are some common methods for implementing a running counter in a loop to differentiate between even and odd data rows?

To implement a running counter in a loop to differentiate between even and odd data rows in PHP, you can use the modulus operator (%) to check if the counter is even or odd. If the counter divided by 2 leaves a remainder of 0, it's an even row, otherwise, it's an odd row. 

// Initialize counter
$counter = 1;

// Loop through data rows
foreach ($dataRows as $row) {
    // Check if counter is even or odd
    if ($counter % 2 == 0) {
        // Even row
        echo "Even row: " . $row . "\n";
    } else {
        // Odd row
        echo "Odd row: " . $row . "\n";
    }
    
    // Increment counter
    $counter++;
}

Keywords

PHP loop counter even odd

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