What are the common syntax errors that can occur when using elseif statements in PHP, and how can they be resolved?

One common syntax error when using elseif statements in PHP is forgetting to include the opening and closing parentheses after the elseif keyword. This can cause a syntax error and result in unexpected behavior in your code. To resolve this issue, always make sure to include the parentheses after the elseif keyword to properly evaluate the condition.

// Incorrect syntax
if ($condition1) {
    // do something
}
elseif $condition2 { // missing parentheses after elseif
    // do something else
}

// Correct syntax
if ($condition1) {
    // do something
}
elseif ($condition2) { // include parentheses after elseif
    // do something else
}